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>

biome.json

@@ -0,0 +1,26 @@
+{
+  "$schema": "https://biomejs.dev/schemas/2.4.8/schema.json",
+  "vcs": { "enabled": true, "clientKind": "git", "useIgnoreFile": true },
+  "files": { "ignoreUnknown": true, "includes": ["src/**"] },
+  "formatter": {
+    "enabled": true,
+    "indentStyle": "space",
+    "indentWidth": 2,
+    "lineWidth": 120
+  },
+  "linter": {
+    "enabled": true,
+    "rules": {
+      "recommended": true,
+      "suspicious": { "noExplicitAny": "off" },
+      "style": { "noNonNullAssertion": "off" }
+    }
+  },
+  "javascript": {
+    "formatter": { "quoteStyle": "single", "semicolons": "asNeeded" }
+  },
+  "assist": {
+    "enabled": true,
+    "actions": { "source": { "organizeImports": "on" } }
+  }
+}