[Feature] Add Cloudflare Worker as deployment option (#170)

* docs(cloudflare): add detailed Cloudflare Workers + R2 deploy guide

* separated cloudflare deploy guide from readme.md

* Missing R2 bucket binding for incremental cache

* docs: move Cloudflare guide to docs/ and improve documentation

- Move Cloudflare_Deploy.md to docs/ folder
- Add 'Deploy without R2' option for simple/free deployments
- Add workers.dev subdomain registration instructions
- Add missing global_fetch_strictly_public flag
- Add troubleshooting for common deployment issues
- Update README.md link to new location

* fix: conditional import for cloudflare dev and regenerate lockfile

- Use dynamic import for @opennextjs/cloudflare to avoid loading workerd during builds
- Regenerate package-lock.json with cross-platform dependencies

* fix: use main lockfile with cloudflare deps added

- Use main branch's package-lock.json as base to ensure cross-platform deps
- Add @opennextjs/cloudflare and wrangler

---------

Co-authored-by: dayuan.jiang <jdy.toh@gmail.com>

next.config.ts

@@ -17,3 +17,13 @@ const nextConfig: NextConfig = {
 }
 
 export default nextConfig
+
+// Initialize OpenNext Cloudflare for local development only
+// This must be a dynamic import to avoid loading workerd binary during builds
+if (process.env.NODE_ENV === "development") {
+    import("@opennextjs/cloudflare").then(
+        ({ initOpenNextCloudflareForDev }) => {
+            initOpenNextCloudflareForDev()
+        },
+    )
+}