Enhance Discord emoji selection with Unicode support and improved UI

- Added support for Unicode emojis in the Discord emoji selector, allowing users to search and select from a comprehensive emoji library.
- Refactored the emoji selection component to include a category sidebar and skin tone options, improving user experience and accessibility.
- Updated localization files to include new emoji-related terms and categories in both English and German.
- Introduced a new dependency on `@emoji-mart/data` for better emoji management and search functionality.
- Enhanced the overall layout and functionality of the emoji picker, ensuring a more intuitive interface for users.

apps/webui/src/messages/en.json

@@ -748,9 +748,24 @@
       "roleDescription": "Description (optional)",
       "roleDescriptionPlaceholder": "Short text for dropdown",
       "addRole": "Add role",
-      "emojiPlaceholder": "Search emoji…",
+      "emojiPlaceholder": "Choose emoji…",
+      "emojiSearch": "Find the perfect emoji",
+      "emojiSearchResults": "Search results",
       "emojiServer": "Server",
+      "emojiServerEmpty": "No server emojis available.",
       "emojiUnicode": "Standard",
+      "emojiSkinTone": "Skin tone",
+      "emojiHoverHint": "Pick an emoji",
+      "emojiCategories": {
+        "people": "Smileys & People",
+        "nature": "Animals & Nature",
+        "foods": "Food & Drink",
+        "activity": "Activities",
+        "places": "Travel & Places",
+        "objects": "Objects",
+        "symbols": "Symbols",
+        "flags": "Flags"
+      },
       "emojiRequired": "Reaction mode requires an emoji for every role.",
       "tooManyRoles": "Maximum 25 roles per panel.",
       "rolesBuilderHint": "Pick a role, label, and optional emoji/description. Reaction mode requires an emoji.",