Add ModeTemplate with Svelte 5 frontend and components

- Create reusable components: auth, api-client, shared-types
- ModeTemplate with Hono backend and SvelteKit frontend
- Auth store refactored to class-based Svelte 5 pattern
- SSR-safe hydrate() pattern for localStorage access
- Frontend builds successfully with Svelte 5 runes

ModeTemplate/package.json

@@ -0,0 +1,17 @@
+{
+  "name": "mode-template",
+  "version": "1.0.0",
+  "type": "module",
+  "scripts": {
+    "dev": "bun run backend/server.ts",
+    "dev:frontend": "cd frontend && bun run dev",
+    "dev:all": "bun run dev & bun run dev:frontend"
+  },
+  "dependencies": {
+    "hono": "^4.0.0"
+  },
+  "devDependencies": {
+    "bun-types": "latest",
+    "typescript": "^5.0.0"
+  }
+}