refactor: migrate to Next.js with edge functions and update relay utilities

- Removed old relay utilities and tests, replacing them with a new structure under `src/lib/relay-utils.ts`.
- Implemented a new edge function in `app/api/proxy/route.ts` to handle proxy requests.
- Created a new Next.js layout and page structure for the frontend, including a user interface for testing the proxy.
- Added Tailwind CSS for styling and configured PostCSS.
- Updated TypeScript configuration for better compatibility with Next.js.
- Removed unused files and configurations related to the previous setup.

tsconfig.json

@@ -1,30 +1,27 @@
 {
-	"compilerOptions": {
-		"lib": ["ESNext"],
-		"target": "ESNext",
-		"module": "Preserve",
-		"moduleDetection": "force",
-		"jsx": "react-jsx",
-		"allowJs": true,
-		"types": ["bun"],
-
-		// Bundler mode
-		"moduleResolution": "bundler",
-		"allowImportingTsExtensions": true,
-		"verbatimModuleSyntax": true,
-		"noEmit": true,
-
-		// Best practices
-		"strict": true,
-		"skipLibCheck": true,
-		"noFallthroughCasesInSwitch": true,
-		"noUncheckedIndexedAccess": true,
-		"noImplicitOverride": true,
-
-		// Path aliases
-		"paths": {
-			"~/*": ["./src/*"]
-		}
-	},
-	"include": ["src/**/*"]
+  "compilerOptions": {
+    "target": "ESNext",
+    "lib": ["dom", "dom.iterable", "esnext"],
+    "allowJs": true,
+    "skipLibCheck": true,
+    "strict": true,
+    "noEmit": true,
+    "esModuleInterop": true,
+    "module": "esnext",
+    "moduleResolution": "bundler",
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+    "jsx": "preserve",
+    "incremental": true,
+    "plugins": [
+      {
+        "name": "next"
+      }
+    ],
+    "paths": {
+      "@/*": ["./src/*"]
+    }
+  },
+  "include": ["next-env.d.ts", "**/*.ts", "**/*.tsx", ".next/types/**/*.ts"],
+  "exclude": ["node_modules"]
 }