feat(client): setup formatting

- Installed @antfu/eslint-config for formatting
- Installed lint-staged for pre-commit formatting compliance

Signed-off-by: Noa Virellia <noa@requiem.garden>

client/src/App.tsx

@@ -1,5 +1,5 @@
 function App() {
-  return <p>Hello world</p>
+  return <p>Hello world</p>;
 }
 
-export { App }
+export { App };

client/src/main.tsx

@@ -1,9 +1,9 @@
-import { StrictMode } from 'react'
-import { createRoot } from 'react-dom/client'
-import { App } from './App.tsx'
+import { StrictMode } from 'react';
+import { createRoot } from 'react-dom/client';
+import { App } from './App.tsx';
 
 createRoot(document.getElementById('root')!).render(
   <StrictMode>
     <App />
   </StrictMode>,
-)
+);