minor #2807 [Toolkit] Remove Kit::$uxIcon, make icons internal to the website (Kocal)

This PR was merged into the 2.x branch.

Discussion
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[Toolkit] Remove `Kit::$uxIcon`, make icons internal to the website

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no <!-- please update src/**/CHANGELOG.md files -->
| Docs?         | no <!-- required for new features -->
| Issues        | Fix #... <!-- prefix each issue number with "Fix #", no need to create an issue if none exist, explain below instead -->
| License       | MIT

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Replace this notice by a description of your feature/bugfix.
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 - For new features, provide some code snippets to help understand usage.
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Commits
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43d7ca1 [Toolkit] Remove `Kit::$uxIcon`, make icons internal to the website

Author: Kocal

src/Toolkit/kits/shadcn/manifest.json

@@ -2,6 +2,5 @@
     "name": "Shadcn UI",
     "description": "Component based on the Shadcn UI library, one of the most popular design systems in JavaScript world.",
     "license": "MIT",
-    "homepage": "https://ux.symfony.com/components",
-    "ux-icon": "simple-icons:shadcnui"
+    "homepage": "https://ux.symfony.com/components"
 }

src/Toolkit/src/Kit/KitFactory.php

@@ -53,7 +53,6 @@ public function createKitFromAbsolutePath(string $absolutePath): Kit
             homepage: $manifest['homepage'] ?? throw new \InvalidArgumentException('Manifest file is missing "homepage" key.'),
             license: $manifest['license'] ?? throw new \InvalidArgumentException('Manifest file is missing "license" key.'),
             description: $manifest['description'] ?? null,
-            uxIcon: $manifest['ux-icon'] ?? null,
         );
 
         $this->kitSynchronizer->synchronize($kit);

ux.symfony.com/assets/icons/simple-icons/shadcnui.svg renamed to ux.symfony.com/assets/icons/toolkit/shadcn.svg

@@ -64,11 +64,9 @@ tree templates/components
         <div class="mt-5 shadow-blur shadow-blur--rainbow shadow-blur--opacity-20" style="display: grid; gap: 2rem; grid-template-columns: repeat(auto-fill, minmax(min(100%, 420px), 1fr));">
             {% for kit_id, kit in kits %}
                 <div class="PackageBox">
-                    {% if kit.uxIcon %}
-                        <div class="PackageBox_logo">
-                            <twig:ux:icon name="{{ kit.uxIcon }}" alt="{{ kit.name }}" style="color: #fff; width: 50%; height: 50%;" />
-                        </div>
-                    {% endif %}
+                    <div class="PackageBox_logo">
+                        <twig:ux:icon name="toolkit:{{ kit_id }}" alt="{{ kit.name }}" style="color: #fff; width: 50%; height: 50%;" />
+                    </div>
                     <div class="PackageBox_content">
                         <h2 class="PackageBox_title">
                             <a href="{{ path('app_toolkit_kit', {kitId: kit_id}) }}" class="PackageBox_link">{{ kit.name }}</a>