chore: migrate to Tailwind CSS v4.0 (#632)

* chore: migrate PostCSS configuration to v4

* chore: update dependencies in package.json and package-lock.json

- Bump versions for autoprefixer, postcss, postcss-cli, prettier, and tailwindcss.
- Remove unused dependencies to streamline the project.

* chore: add @tailwindcss/postcss and update package-lock.json

* fix: update import paths in CSS files for consistency

* fix: change prefix from `hx-` to `hx:`

* chore: migrate primary color theme variables to CSS

* fix: remove unnecessary text decoration property from anchor styles in typography CSS

* fix: update CSS styles for improved consistency and clarity across components

* chore: clean up package.json and package-lock.json, remove unused dependencies, and update CSS imports for better organization

* fix: bulk replace prefix `hx-` with `hx:`

* fix: update tailwind css prefix

* fix: styling consistent issues

- steps counter fix in v4
- removed tailwind.css
- update hr border colors
- fix button cursor in v4
- fix border colors in various places

* fix: update class prefixes for consistency in menu and sidebar components

* fix: refine CSS classes and transitions for navbar and sidebar components

- Updated hamburger menu styles for improved animation and structure.
- Adjusted sidebar transition duration for smoother effects.
- Standardized class prefixes for consistency across components.

* fix: update border color in hero badge component for improved styling consistency

* fix: update tab button cursor style for improved user interaction

* chore: recompile css

* fix: dark mode color not applied for before / after elements

* fix: docs navigation

* chore: recompile CSS

* chore: update Tailwind CSS and PostCSS dependencies to version 4.0.17, recompile CSS, and add safelist

* fix: typo in class name and add back decoration-from-font for typography a tags

* fix: update class syntax for Tailwind CSS compatibility in mermaid code block

layouts/shortcodes/filetree/container.html

@@ -1,5 +1,5 @@
-<div class="hextra-filetree hx-mt-6 hx-select-none hx-text-sm hx-text-gray-800 dark:hx-text-gray-300 not-prose">
-  <div class="hx-inline-block hx-rounded-lg hx-border hx-px-4 hx-py-2 dark:hx-border-neutral-800">
+<div class="hextra-filetree hx:mt-6 hx:select-none hx:text-sm hx:text-gray-800 hx:dark:text-gray-300 not-prose">
+  <div class="hx:inline-block hx:rounded-lg hx:px-4 hx:py-2 hx:border hx:border-gray-200 hx:dark:border-neutral-800">
     {{- .InnerDeindent -}}
   </div>
 </div>

layouts/shortcodes/filetree/file.html

@@ -1,9 +1,9 @@
 {{- $name := .Get "name" -}}
 
 
-<li class="hx-flex hx-list-none">
-  <span class="hx-inline-flex hx-cursor-default hx-items-center hx-py-1">
+<li class="hx:flex hx:list-none">
+  <span class="hx:inline-flex hx:cursor-default hx:items-center hx:py-1">
     {{- partial "utils/icon" (dict "name" "document-text" "attributes" "width=1em") -}}
-    <span class="ltr:hx-ml-1 rtl:hx-mr-1">{{ $name | markdownify }}</span>
+    <span class="hx:ltr:ml-1 hx:rtl:mr-1">{{ $name | markdownify }}</span>
   </span>
 </li>

layouts/shortcodes/filetree/folder.html

@@ -1,17 +1,17 @@
 {{- $name := .Get "name" -}}
 {{- $state := .Get "state" | default "open" }}
 
-<li class="hx-group hx-flex hx-list-none hx-flex-col">
-  <button class="hextra-filetree-folder hx-inline-flex hx-cursor-pointer hx-items-center hx-py-1 hover:hx-opacity-60">
-    <span data-state="{{ $state }}" class="data-[state=open]:hx-hidden">
+<li class="hx:group hx:flex hx:list-none hx:flex-col">
+  <button class="hextra-filetree-folder hx:inline-flex hx:cursor-pointer hx:items-center hx:py-1 hx:hover:opacity-60">
+    <span data-state="{{ $state }}" class="hx:data-[state=open]:hidden">
       {{- partial "utils/icon" (dict "name" "folder" "attributes" "width=1em") -}}
     </span>
-    <span data-state="{{ $state }}" class="data-[state=closed]:hx-hidden">
+    <span data-state="{{ $state }}" class="hx:data-[state=closed]:hidden">
       {{- partial "utils/icon" (dict "name" "folder-open" "attributes" "width=1em") -}}
     </span>
-    <span class="ltr:hx-ml-1 rtl:hx-mr-1">{{ $name }}</span>
+    <span class="hx:ltr:ml-1 hx:rtl:mr-1">{{ $name }}</span>
   </button>
-  <ul data-state="{{ $state }}" class="ltr:hx-pl-5 rtl:hx-pr-5 data-[state=closed]:hx-hidden">
+  <ul data-state="{{ $state }}" class="hx:ltr:pl-5 hx:rtl:pr-5 hx:data-[state=closed]:hidden">
     {{- .InnerDeindent -}}
   </ul>
 </li>