Add Filament admin panel and creative public portfolio site

Adds a Filament admin (Profile settings page plus CRUD resources for
Education, Experience, Projects, and Posts) backing a public-facing
personal site: hero/about/timeline home page, project showcase, and
blog, styled with a dark editorial theme (Fraunces + Instrument Sans).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

composer.json

@@ -7,6 +7,7 @@
     "license": "MIT",
     "require": {
         "php": "^8.3",
+        "filament/filament": "^5.0",
         "laravel/framework": "^13.8",
         "laravel/tinker": "^3.0"
     },
@@ -50,7 +51,8 @@
         ],
         "post-autoload-dump": [
             "Illuminate\\Foundation\\ComposerScripts::postAutoloadDump",
-            "@php artisan package:discover --ansi"
+            "@php artisan package:discover --ansi",
+            "@php artisan filament:upgrade"
         ],
         "post-update-cmd": [
             "@php artisan vendor:publish --tag=laravel-assets --ansi --force"