feat: Add Markdown View Plugin with React and Chakra UI

- Implemented main application structure with App and View components.
- Integrated React Markdown for rendering Markdown content.
- Added API function to fetch Markdown content from the backend.
- Created a custom Chakra UI theme to align with Airflow's design.
- Configured Vite for building the application with appropriate asset paths.
- Included a sample Markdown file for initial content display.
- Set up TypeScript configuration for better development experience.

markdown_view_plugin/ui/tsconfig.node.json

@@ -0,0 +1,10 @@
+{
+  "compilerOptions": {
+    "composite": true,
+    "skipLibCheck": true,
+    "module": "ESNext",
+    "moduleResolution": "bundler",
+    "allowSyntheticDefaultImports": true
+  },
+  "include": ["vite.config.ts"]
+}