[API] endpoints to manage user/org/repo avatars

[6543]

GET, SET, DELETE endpoints are needed

to simplify I would propose:

user

• GET /users/{username}/avatar -> return raw image
• PUT /users/{username}/avatar -> return status 204 (add img within request body)
• DELETE /users/{username}/avatar -> return status 204 (rm and use default avatar)

org

• GET /orgs/{org}/avatar -> return raw image
• PUT /orgs/{org}/avatar -> return status 204 (add img within request body)
• DELETE /orgs/{org}/avatar -> return status 204 (rm and use default avatar)

repo

• GET /repos/{owner}/{repo}/avatar -> return raw image
• PUT /repos/{owner}/{repo}/avatar -> return status 204 (add img within request body)
• DELETE /repos/{owner}/{repo}/avatar -> return status 204 (rm and use default avatar)

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ref: https://codeberg.org/gitnex/GitNex/issues/552

[delvh]

I would say that this issue depends upon #17123 to be implemented the easiest.

[denyskon]

Mostly implemented by #25369

[lunny]

Only GET missed?

[denyskon]

Yes, and I think we only have the ability to set own user avatar, not for another user

[6543]

Yes, and I think we only have the ability to set own user avatar, not for another user

that's what only admins should do and what the sudo header is for