### What?
Makes this to actually work
```ts
import type { RequestContext as OriginalRequestContext } from 'payload'
declare module 'payload' {
// Create a new interface that merges your additional fields with the original one
export interface RequestContext extends OriginalRequestContext {
myObject?: string
// ...
}
}
```
<img width="502" alt="image"
src="https://github.com/user-attachments/assets/38570d3c-e8a8-48aa-a57d-6d11e79394f5">
### Why?
This is described in our docs
https://payloadcms.com/docs/beta/hooks/context#typescript therefore it
should work.
### How?
In order to get the declaration work, we need to reuse the type from the
root file `payload/src/index.js`. Additionally, removes `RequestContext`
type duplication in both `payload/src/types/index.js` and
`payload/src/index.js`.
Fixes https://github.com/payloadcms/payload/issues/8851
f52b7c45c0