DOC-3021: Add premium labels and refine plugin index descriptions

- Add a styled premium label to premium plugin cards and the TinyMCE AI banner
- Fix two-column card tables dropping the last plugin on odd counts (Spell Checker, Suggested Edits, Tiny Drive, Templates, Search and Replace)
- Rewrite plugin descriptions in a consistent indicative voice and correct inaccuracies verified against source (Enhanced Tables, Import from Word, Accessibility Checker, Visual Characters, Revision History, Full Page HTML, Media, Lists, Quick Toolbars, Autolink, Word Count)
- Use sentence case headings and remove second-person phrasing on the plugins page

Author: kemister85

modules/ROOT/pages/plugins.adoc

@@ -2,14 +2,14 @@
 :navtitle: Plugins
 :description: This section lists the all plugins provided by {companyname}.
 
-This page organizes {productname} plugins into functional categories to help you quickly find the features you need. Each section is labeled as either Premium or Open Source and groups plugins by purpose, such as writing, layout, code editing, and productivity, making it easier to identify the right plugin for your use case.
+This page organizes {productname} plugins into functional categories for quick reference. Each section is labeled as either premium or open source and groups plugins by purpose, such as writing, layout, code editing, and productivity, making it easier to identify the right plugin for a given use case.
 
 [[premium-plugins]]
-== Premium Plugins
+== Premium plugins
 
 include::partial$index-pages/premium-plugins.adoc[]
 
 [[open-source-plugins]]
-== Open Source Plugins
+== Open source plugins
 
 include::partial$index-pages/opensource-plugins.adoc[]

modules/ROOT/partials/index-pages/opensource-plugins.adoc

@@ -9,73 +9,73 @@ a|
 [.lead]
 xref:charmap.adoc[Character Map]
 
-Enables insertion of special characters into {productname}.
+Inserts special characters into {productname}.
 
 a|
 [.lead]
 xref:directionality.adoc[Directionality]
 
-Adds toolbar buttons for setting text direction to left-to-right or right-to-left.
+Sets text direction to left-to-right or right-to-left.
 
 a|
 [.lead]
 xref:emoticons.adoc[Emoticons]
 
-Enables insertion of emoticons into {productname} content.
+Inserts emoticons into {productname} content.
 
 a|
 [.lead]
 xref:image.adoc[Image]
 
-Enables inserting and managing images in {productname}.
+Inserts and manages images in {productname}.
 
 a|
 [.lead]
 xref:insertdatetime.adoc[Insert Date/Time]
 
-Insert the current date and/or time into {productname}.
+Inserts the current date or time into {productname}.
 
 a|
 [.lead]
 xref:link.adoc[Link]
 
-Enables adding and editing hyperlinks within content.
+Adds and edits hyperlinks within content.
 
 a|
 [.lead]
 xref:lists.adoc[Lists]
 
-Normalize list behavior across different browsers.
+Enables numbered and bulleted lists and normalizes list behavior across browsers.
 
 a|
 [.lead]
 xref:advlist.adoc[List Styles]
 
-Enables creation of styled ordered and unordered lists.
+Creates styled ordered and unordered lists.
 
 a|
 [.lead]
 xref:media.adoc[Media]
 
-Embed and manage HTML5 video and audio elements in {productname}.
+Inserts and manages embedded media, including video, audio, and iframe embeds.
 
 a|
 [.lead]
 xref:nonbreaking.adoc[Nonbreaking Space]
 
-Enables insertion of non-breaking spaces.
+Inserts non-breaking spaces.
 
 a|
 [.lead]
 xref:pagebreak.adoc[Page Break]
 
-Enables insertion of a page break into content.
+Inserts a page break into content.
 
 a|
 [.lead]
 xref:table.adoc[Table]
 
-Create and edit tables, including structure and cell formatting.
+Creates and edits tables, including structure and cell formatting.
 
 |===
 
@@ -88,49 +88,49 @@ a|
 [.lead]
 xref:accordion.adoc[Accordion]
 
-Enables creation of expandable and collapsible content sections.
+Creates expandable and collapsible content sections.
 
 a|
 [.lead]
 xref:anchor.adoc[Anchor]
 
-Insert anchors (bookmarks) that allow users to link directly to content.
+Inserts anchors (bookmarks) that link directly to content.
 
 a|
 [.lead]
 xref:fullscreen.adoc[Full Screen]
 
-Expands the editor to full-screen mode for focused editing.
+Expands the editor to full-screen mode.
 
 a|
 [.lead]
 xref:importcss.adoc[Import CSS]
 
-Imports CSS class names into the Format dropdown for styling content.
+Imports CSS class names into the Formats menu for styling content.
 
 a|
 [.lead]
 xref:preview.adoc[Preview]
 
-Displays a read-only preview of the current content in a separate view.
+Displays a read-only preview of the current content.
 
 a|
 [.lead]
 xref:quickbars.adoc[Quick Toolbars]
 
-Provides contextual toolbar controls that appear near selected content to speed up formatting and editing workflows.
+Adds context toolbars for text selections, images, and inserting content on empty lines.
 
 a|
 [.lead]
 xref:visualblocks.adoc[Visual Blocks]
 
-Enables visual outlines of block elements, helping users understand and structure document layout more effectively. 
+Shows visual outlines of block-level elements.
 
 a|
 [.lead]
 xref:visualchars.adoc[Visual Characters]
 
-Enables visibility of hidden characters such as spaces and breaks to help troubleshoot formatting issues.
+Displays nonbreaking spaces and soft hyphens as visible characters.
 
 |===
 
@@ -144,19 +144,22 @@ a|
 [.lead]
 xref:code.adoc[Code]
 
-Enables direct editing of HTML source code for users who need full control over document markup.
+Edits the HTML source code of the content directly.
 
 a|
 [.lead]
 xref:codesample.adoc[Code Sample]
 
-Enables insertion of formatted, syntax-highlighted code snippets for technical documentation or developer content.
+Inserts syntax-highlighted code snippets.
 
 a|
 [.lead]
 xref:searchreplace.adoc[Search and Replace]
 
-Find and replace text across content, improving efficiency when making large-scale edits.
+Finds and replaces text across content.
+
+a|
+// Dummy cell to even out the two-column grid (odd number of plugins).
 
 |===
 
@@ -170,37 +173,37 @@ a|
 [.lead]
 xref:autolink.adoc[Autolink]
 
-Automatically converts URLs into clickable links, saving users time and ensuring consistent link formatting.
+Converts typed URLs and email addresses into links automatically.
 
 a|
 [.lead]
 xref:autoresize.adoc[Autoresize]
 
-Automatically adjusts the editor height to match content, improving usability and reducing scroll friction.
+Resizes the editor to fit its content.
 
 a|
 [.lead]
 xref:autosave.adoc[Autosave]
 
-Automatically saves content in the browser to prevent data loss during editing sessions.
+Saves content in the local browser to prevent data loss.
 
 a|
 [.lead]
 xref:help.adoc[Help]
 
-Provides quick access to documentation and guidance, helping users understand editor features without leaving the interface.
+Displays a help dialog with documentation and guidance.
 
 a|
 [.lead]
 xref:save.adoc[Save]
 
-Adds a manual save button so users can explicitly store content when needed.
+Adds a button for manually saving content.
 
 a|
 [.lead]
 xref:wordcount.adoc[Word Count]
 
-Displays real-time word count to help users track content length and meet writing requirements.
+Displays real-time word and character counts in the status bar.
 
 |===