Ability to add custom links in `repo tabs` and/or `repo sub-tabs`
Ability to add custom links in
repo tabs and/or
Repo tabs links is "overview", "source", "commits", etc.
Repo sub-tabs is sub-tabs for
For example, repo tab "issues" has repo sub-tabs "create issue", "filter all", "filter open", "filter my issues", etc.
Custom filters to search in-one-click.