Create neat-beds-unite.md

.changeset/neat-beds-unite.md

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+---
+"remix": minor
+"@remix-run/cloudflare": minor
+"@remix-run/deno": minor
+"@remix-run/node": minor
+"@remix-run/react": minor
+"@remix-run/serve": minor
+"@remix-run/server-runtime": minor
+---
+
+feat(@remix-run/cloudflare,@remix-run/deno,@remix-run/node): `SerializeFrom` utility for loader and action type inference
+
+Each runtime package (@remix-run/cloudflare,@remix-run/deno,@remix-run/node) now exports `SerializeFrom`, which is used to
+infer the JSON-serialized return type of loaders and actions.
+
+Example:
+```ts
+type MyLoaderData = SerializeFrom<typeof loader>
+type MyActionData = SerializeFrom<typeof action>
+```
+
+This is what `useLoaderData<typeof loader>` and `useActionData<typeof action>` use under-the-hood.