Implement support for Forgejo commit statuses

[lbarcziova]

• implement methods for the class inheriting from CommitFlag
• use functionality from https://codeberg.org/harabat/pyforgejo/src/branch/main/pyforgejo/api/repository

Client usage docs: https://codeberg.org/harabat/pyforgejo#usage

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Part of #866

[olamidepeterojo]

Hello @lbarcziova, I am interested and want to contribute to this issue.

[p0tat0chip]

Hello @olamidepeterojo, I would like to apologise, I have already been working on this and just left with writing tests and waiting for my other PR to merge. Would you be open to work on something else ?
Thanks for understanding

[olamidepeterojo]

Hello @p0tat0chip, thanks for letting me know but i am an Outreachy applicant and based on the project guide, i checked and saw it wasn't assigned to anyone neither did anyone show interest. so i indicated then went ahead to start working and i'm done with the PR. Thank you for understanding

[lbarcziova]

thanks both for the efforts! @p0tat0chip if you already have the code you can also submit a PR, but as @olamidepeterojo wrote, since he indicated his effort earlier, we would prioritise that.