feat(GitHub): Add "Open in Obtainium" shortcut to repository menu

[LbsLightX]

Feature description

I would like to request a new patch for the GitHub app. It would be incredibly useful to have an "Open in Obtainium" (or "Add to Obtainium") option added to the top-right 3-dot menu on any repository page.

When a user clicks this option, it should trigger an intent that opens the Obtainium app and automatically passes the current repository's URL into Obtainium's "Add app" source URL field. This would completely eliminate the manual steps of copying the repository link, opening Obtainium, navigating to the "Add app" tab, and pasting the link.

Maybe somewhere around here--

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App name

GitHub

Acknowledgements

• I am NOT asking for a patch of a new app.
• I have checked all open and closed feature requests and this is not a duplicate.
• I have chosen an appropriate title.
• All requested information has been provided properly.