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>

resources/views/components/site/nav.blade.php

@@ -0,0 +1,16 @@
+@php
+    $profile = \App\Models\Profile::query()->first();
+@endphp
+<header class="sticky top-0 z-40 border-b border-white/5 bg-ink/80 backdrop-blur-md">
+    <nav class="mx-auto flex max-w-5xl items-center justify-between px-6 py-4">
+        <a href="{{ route('home') }}" class="font-display text-lg font-semibold tracking-tight text-paper">
+            {{ $profile?->name ?? config('app.name') }}<span class="text-accent">.</span>
+        </a>
+
+        <div class="flex items-center gap-6 text-sm text-paper-dim">
+            <a href="{{ route('home') }}#about" class="transition hover:text-paper">About</a>
+            <a href="{{ route('projects.index') }}" class="transition hover:text-paper {{ request()->routeIs('projects.*') ? 'text-paper' : '' }}">Projects</a>
+            <a href="{{ route('posts.index') }}" class="transition hover:text-paper {{ request()->routeIs('posts.*') ? 'text-paper' : '' }}">Blog</a>
+        </div>
+    </nav>
+</header>