Use calens with gitea

[xoxys]

I would like to use calens with Gitea instead of GitHub. Gitea is using the same URL schema as GitHub for issues and for pull requests it is /pulls/<number> instead of pull/<number>. What do you think about adding a cli flag to set a custom server URL instead of the hard coded github.com and support Gitea servers too?

[fd0]

Adding a CLI flag which allows customizing the regular expressions to extract URLs would work, are you interested in working on this?

[xoxys]

Yes I could look into it if you would accept a PR.

[fd0]

I think that's possible :)