Add Font Awesome icons and refactor tech icon handling

- Added Font Awesome dependencies for enhanced icon support.
- Refactored tech icon components to utilize Font Awesome icons instead of custom SVGs.
- Updated skill data files to include icon properties for various technologies.
- Removed obsolete tech icon files to streamline the codebase.

lib/types.ts

@@ -23,6 +23,7 @@ export interface Skill {
   id: string;
   name: string;
   description: string;
+  icon?: string;
   links: string[];
 }