Initial commit: full-stack Bun + Elysia + React template

Elysia.js API with session-based auth (email/password + Google OAuth),
role system (USER/ADMIN/SUPER_ADMIN), Prisma + PostgreSQL, React 19
with Mantine UI, TanStack Router, dark theme, and comprehensive test
suite (unit, integration, E2E with Lightpanda).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

prisma/migrations/20260331084655_add_role/migration.sql

@@ -0,0 +1,5 @@
+-- CreateEnum
+CREATE TYPE "Role" AS ENUM ('USER', 'ADMIN', 'SUPER_ADMIN');
+
+-- AlterTable
+ALTER TABLE "user" ADD COLUMN     "role" "Role" NOT NULL DEFAULT 'USER';