Implement contributors graph

[silverwind]

Continuation of #25439.

@sahinakkaya you have push access to my fork to continue working on it.

[silverwind]

I did some layout fixes in b71882c, now looks like this:

Open bugs that I noticed:

1. I'm incorrectly shown multiple times, it should only show one box per Gitea account.
2. Colors need adjustment for dark theme.
3. "Commits" should be a link and spacing needs tweaks.

[denyskon]

@silverwind I don't have an overview of what's implemented in this PR, but maybe you used different mail addresses? Don't we then need mailmap support?

[silverwind]

Yes, different e-mail addresses and author name case because of commits from web ui. We need to dedupe based on associated Gitea account.

[sahinakkaya]

1. I'm incorrectly shown multiple times, it should only show one box per Gitea account.

IIRC, it should show a box per mail address. Maybe you used 3 different mail address as committer email?

[silverwind]

Yes:

$ git log | grep Author: | sort | uniq
Author: Silverwind <silverwind@noreply.localhost>
Author: silverwind <silverwind2@noreply.localhost>
Author: silverwind <silverwind3@noreply.localhost>

Gitea accounts have multiple e-mails associated with them. We need combine those three above into one sum box as they all link to the same Gitea account. If you could take a look at that, I will continue with UI tweaks.

[sahinakkaya]

If you could take a look at that, I will continue with UI tweaks.

I would like to but I am not familiar with the code base that much. If you can tell me how can I find the Gitea account of a user via email address, I might try to fix it.