Turbopack: RawEcmascriptModule (#81806)
Add a JS module type that does no analysis, and just concatenates the source file into the output file.
As a consequence however, the input module cannot have
- `import`s/`require`s/`new Worker`/...
- ~~`process.env.*` that should be replaced~~
- JSX/any new syntax, since the module won't be transpiled using the user's browserslist
```
before:
✓ Starting...
✓ Ready in 335ms
○ Compiling / ...
✓ Compiled / in 980ms
GET / 200 in 1258ms
after:
✓ Starting...
✓ Ready in 406ms
✓ Compiled / in 406ms
GET / 200 in 692ms
```
<img width="1358" height="959" alt="Bildschirmfoto 2025-09-16 um 12 09 47" src="https://github.com/user-attachments/assets/87bb3161-8749-475b-9a84-bf62324735e4" />
<img width="1352" height="939" alt="Bildschirmfoto 2025-09-16 um 12 12 48" src="https://github.com/user-attachments/assets/4a42e724-7090-4ca7-bad9-41e5cf1af80b" />
