refactor: migrate to monorepo structure with Docker, PocketBase, and e2e tests

- Reorganize into apps/, packages/, docs/, e2e/, pocketbase/ directories
- Add Dockerfiles for web, worker, and PocketBase services
- Add docker-compose.yml for local orchestration
- Add turbo.json for monorepo task management
- Add Playwright e2e test infrastructure
- Add PocketBase backend with migrations
- Remove Vite/Next.js/ESLint/PostCSS config files
- Update package.json with workspace dependencies
- Add .env.example and .dockerignore

pocketbase/pb_migrations/1700000029_create_error_logs.js

@@ -0,0 +1,44 @@
+module.exports = {
+  up: async (app) => {
+    const collection = new app.models.Collection({
+      name: 'error_logs',
+      type: 'base',
+      schema: app.models.NewSchema([
+        app.models.NewSchemaField({
+          name: 'code',
+          type: 'text',
+          options: { maxSize: 255 }
+        }),
+        app.models.NewSchemaField({
+          name: 'message',
+          type: 'text',
+          options: {}
+        }),
+        app.models.NewSchemaField({
+          name: 'details',
+          type: 'json',
+          options: {}
+        }),
+        app.models.NewSchemaField({
+          name: 'stack_trace',
+          type: 'text',
+          options: {}
+        }),
+        app.models.NewSchemaField({
+          name: 'source',
+          type: 'text',
+          options: { maxSize: 255 }
+        })
+      ]),
+      indexes: [
+        'CREATE INDEX idx_error_logs_code ON error_logs (code)',
+        'CREATE INDEX idx_error_logs_source ON error_logs (source)'
+      ]
+    });
+    return app.save(collection);
+  },
+  down: async (app) => {
+    const collection = await app.findCollectionByNameOrId('error_logs');
+    return app.delete(collection);
+  }
+};