Add Jack 3D Creator portfolio template (Phase 1) with PRD

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Msa87P1aZQSV9MWhEu3VfJ

jack-portfolio/vite.config.ts

@@ -0,0 +1,7 @@
+import { defineConfig } from 'vite';
+import react from '@vitejs/plugin-react';
+
+export default defineConfig({
+  plugins: [react()],
+  base: './',
+});