feat(01-01): scaffold Next.js 16.2.0 project with all Phase 1 dependencies

- Created teressa-copeland-homes with TypeScript, Tailwind, ESLint, App Router, src dir
- Installed next-auth@5.0.0-beta.30 (pinned exact version), drizzle-orm, @neondatabase/serverless
- Installed bcryptjs, @vercel/blob, zod, drizzle-kit, tsx, dotenv
- Added db:generate, db:migrate, db:seed, db:studio npm scripts
- Verified npm run build passes with zero TypeScript errors

teressa-copeland-homes/postcss.config.mjs

@@ -0,0 +1,7 @@
+const config = {
+  plugins: {
+    "@tailwindcss/postcss": {},
+  },
+};
+
+export default config;