Adds new a function, `AcceptsGithubResponse`, to the API router context struct to check if the requests accepts a Github response. Although Forgejo API will never be compatible with the Github API, historically Forgejo's API has been designed to follow that of Github closely and we know that a lot of tooling that uses the Github API can be used against the Forgejo API with little to no problem.
As a meet in the middle solution, this function can be used to respond with a more appropriate response that follows the Github API. This allows Forgejo to avoid breaking compatibility with existing users of the API and allows the API to be oh so slightly more compatible with that of Github for API clients that expect a Github response.
Because the `upload_url` field was added purely to match the Github API (forgejo/forgejo#580), it is fair to actually make it compatible with how the Github API intended it to be and that is by adding `{?name,label}` which is used by Github's Oktokit.
Only add `{?name,label}` when Forgejo knows the request accepts a Github response. This avoids breaking the API compatibility with non-Github API clients.
ResolvesCodeberg/Community#2132
Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/9285
Reviewed-by: 0ko <0ko@noreply.codeberg.org>
Reviewed-by: oliverpool <oliverpool@noreply.codeberg.org>
Co-authored-by: Gusted <postmaster@gusted.xyz>
Co-committed-by: Gusted <postmaster@gusted.xyz>
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