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/frontend/package.json

@@ -0,0 +1,20 @@
+{
+  "name": "mode-template-frontend",
+  "version": "1.0.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite dev",
+    "build": "vite build",
+    "preview": "vite preview"
+  },
+  "dependencies": {
+    "@sveltejs/kit": "^2.0.0",
+    "svelte": "^5.0.0"
+  },
+  "devDependencies": {
+    "@sveltejs/adapter-static": "^3.0.0",
+    "@sveltejs/vite-plugin-svelte": "^4.0.0",
+    "typescript": "^5.0.0",
+    "vite": "^5.0.0"
+  }
+}