Add streaming capabilities to "inngest/cloudflare" handler (#311)

## Summary
<!-- Succinctly describe your change, providing context, what you've
changed, and why. -->

Adds streaming capabilities to to the `"inngest/cloudflare"` serve
handler.

## Checklist
<!-- Tick these items off as you progress. -->
<!-- If an item isn't applicable, ideally please strikeout the item by
wrapping it in "~~"" and suffix it with "N/A My reason for skipping
this." -->
<!-- e.g. "- [ ] ~~Added tests~~ N/A Only touches docs" -->

- [ ] ~Added a [docs PR](https://github.com/inngest/website) that
references this PR~ N/A
- [ ] ~Added unit/integration tests~ N/A
- [x] Added changesets if applicable

.changeset/slimy-gorillas-report.md

@@ -0,0 +1,5 @@
+---
+"inngest": patch
+---
+
+Add streaming capabilities to `"inngest/cloudflare"` handler

packages/inngest/src/cloudflare.ts

@@ -49,7 +49,7 @@ export const frameworkName: SupportedFrameworkName = "cloudflare-pages";
  * Expected arguments for a Cloudflare Pages Function.
  */
 export type PagesHandlerArgs = [
-  { request: Request; env: Record<string, string | undefined> },
+  { request: Request; env: Record<string, string | undefined> }
 ];
 
 /**
@@ -150,6 +150,12 @@ export const serve = (
             headers,
           });
         },
+        transformStreamingResponse: ({ body, status, headers }) => {
+          return new Response(body, {
+            status,
+            headers,
+          });
+        },
       };
     },
   });

packages/inngest/src/helpers/env.ts

@@ -449,6 +449,7 @@ const streamingChecks: Partial<
    * See {@link https://vercel.com/docs/frameworks/nextjs#streaming}
    */
   vercel: (_framework, _env) => typeof EdgeRuntime === "string",
+  "cloudflare-pages": () => true,
 };
 
 export const getPlatformName = (env: Env) => {