Check that organization allows reviews from third-party tools as early as possible

I worked on a PR review, but upon pressing the "submit" button, nothing happens.

The console tells me:
```
https://api.github.com/repos//pulls//reviews 403 (Forbidden)
```
and
```
Uncaught (in promise) HttpError: Although you appear to have the correct authorization credentials, the
`` organization has enabled OAuth App access restrictions, meaning that data access to third-parties is
limited. For more information on these restrictions, including how to enable this app, visit
https://docs.github.com/articles/restricting-access-to-your-organization-s-data/
- https://docs.github.com/rest/pulls/reviews#create-a-review-for-a-pull-request
at fetchWrapper (chunk-mf7bhnzv.js:22378:11)
at async chunk-mf7bhnzv.js:22870:16
at async Object.createPRReview (chunk-mf7bhnzv.js:23407:29)
at async submitReview (chunk-mf7bhnzv.js:77451:21)
at async chunk-mf7bhnzv.js:91874:5
```

So it looks like until I can get those permissions from my org, I cannot use Pulldash for work, and I only learn this at the end of the review process, which means I'll have to rewrite the review.

Inizia con il flusso di invio delle review mostrato nel report, in particolare submitReview e createPRReview, e analizza come rilevare prima l’errore 403 di GitHub relativo alle restrizioni di accesso OAuth App di un’organizzazione. Riproduci il caso di un’organizzazione con restrizioni e conferma che gli utenti vengano avvisati prima di scrivere una review, anziché solo quando premono «submit».

Scritto dal modello di indicizzazione a partire dal testo della issue.