chore: clean up legacy Reason references

Rename the docs color theme to ReScript, remove the unused local Reason Highlight.js grammar, and refresh current docs references that still pointed at Reason-era React/editor resources.

Keep archived blog content and intentional legacy Reason syntax support untouched.

Author: jderochervlk

app/routes/ApiDocs.res

@@ -333,7 +333,7 @@ let make = (props: props) => {
     }
   }
 
-  <SidebarLayout theme=#Reason sidebar rightSidebar> children </SidebarLayout>
+  <SidebarLayout theme=#ReScript sidebar rightSidebar> children </SidebarLayout>
 }
 
 module Data = {

markdown-pages/docs/manual/editor-plugins.mdx

@@ -22,7 +22,6 @@ This section is about the editor plugin for ReScript. It adds syntax highlightin
 We don't officially support these; use them at your own risk!
 
 - [Neovim Tree-sitter](https://github.com/nkrkv/nvim-treesitter-rescript)
-- [IDEA](https://github.com/reasonml-editor/reasonml-idea-plugin)
 - [Emacs](https://github.com/jjlee/rescript-mode)
 
 ## Code analysis

markdown-pages/docs/manual/interop-cheatsheet.mdx

@@ -42,7 +42,7 @@ This is a glossary with examples. All the features are described by later pages.
 - [`@deprecated`](./attribute.mdx#usage)
 - [`genType`](https://github.com/reason-association/genType)
 - [`@JSX`](./jsx.mdx)
-- `@react.component`: [here](../react/introduction.mdx) and [here](https://github.com/reasonml/reason-react)
+- `@react.component`: [here](../react/introduction.mdx) and [here](https://github.com/rescript-lang/rescript-react)
 - [`@warning`](./attribute.mdx#usage)
 - [`@unboxed`](./variant.mdx#untagged-variants)
 

markdown-pages/docs/react/arrays-and-keys.mdx

@@ -295,7 +295,7 @@ let posts = [
   {
     id: "2",
     title: "Installation",
-    content: "You can install reason-react from npm.",
+    content: "You can install @rescript/react from npm.",
   },
 ]
 
@@ -373,7 +373,7 @@ let posts = [
   {
     id: "2",
     title: "Installation",
-    content: "You can install reason-react from npm.",
+    content: "You can install @rescript/react from npm.",
   },
 ];
 
@@ -437,7 +437,7 @@ let posts = [
   {
     id: "2",
     title: "Installation",
-    content: "You can install reason-react from npm.",
+    content: "You can install @rescript/react from npm.",
   },
 ];