chore: update dependencies and add Cloudflare support

- Updated dependencies in package.json for Astro, React, and testing libraries.
- Added .assetsignore to exclude specific files from asset uploads.
- Refactored AccountSummary, MainContent, and Sidebar components for clarity and maintainability.
- Enhanced tsconfig.json to support React JSX syntax.
- Created wrangler.jsonc for Cloudflare Workers configuration.

tsconfig.json

@@ -1,5 +1,14 @@
 {
   "extends": "astro/tsconfigs/strict",
-  "include": [".astro/types.d.ts", "**/*"],
-  "exclude": ["dist"]
-}
+  "include": [
+    ".astro/types.d.ts",
+    "**/*"
+  ],
+  "exclude": [
+    "dist"
+  ],
+  "compilerOptions": {
+    "jsx": "react-jsx",
+    "jsxImportSource": "react"
+  }
+}