Adjust description and tooltip for featherx empty

Now that it's officially supported, let's remove the "experimental"
warning. Also make it show by default instead of being hidden behind
the "show more types" click.

Author: simonbaird

rails/db/migrate/20260601195913_modify_featherx_empty.rb

@@ -0,0 +1,17 @@
+class ModifyFeatherxEmpty < ActiveRecord::Migration[8.0]
+  def up
+    # Should match what's in db/seeds/empties.yml
+    EmptyMigrationHelper.apply_empty_changes(%(
+      featherx:
+        description: The super-light Feather Wiki build with external Javascript and
+          CSS. Less self-contained, but very fast to load and save.
+        tooltip: For the "bones, plumage and muscles" build of Feather Wiki, the initial
+          empty file is around 700 bytes.
+        primary: true
+    ))
+  end
+
+  def down
+    # Never mind
+  end
+end

rails/db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[8.0].define(version: 2026_05_20_000000) do
+ActiveRecord::Schema[8.0].define(version: 2026_06_01_195913) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "pg_catalog.plpgsql"
 

rails/db/seeds/empties.yml

@@ -69,14 +69,14 @@
 - id: 20
   name: featherx
   title: Feather Wiki (external core)
-  description: Feathers & Bones version of Feather Wiki. Experimental tech-preview.
-    Use with caution.
+  description: The super-light Feather Wiki build with external Javascript and
+    CSS. Less self-contained, but very fast to load and save.
   enabled: true
   display_order: 21
-  primary: false
+  primary: true
   info_link: https://feather.wiki/
-  tooltip: With external javascript the initial html file is just 616 bytes. Currently
-    requires a custom build of Feather Wiki.
+  tooltip: For the "bones, plumage and muscles" build of Feather Wiki, the initial
+    empty file is around 700 bytes.
 - id: 21
   name: sitelet
   title: siteleteer