Fix CI/CD pipeline issues from code review FRE-4690

- web-ci.yml: Remove web/ path refs (app is at repo root), fix cache paths, update Vercel action to v30
- ios-ci.yml: Fix swift-format tool name, use debug build for PR CI, add TestFlight deployment job, use env var for Xcode path
- Scaffold package.json, tsconfig.json, vite.config.ts for web project at root

vite.config.ts

@@ -0,0 +1,7 @@
+import { defineConfig } from 'vite';
+
+export default defineConfig({
+  build: {
+    outDir: 'dist',
+  },
+});