Feature Request OneLauncher: Auto-update support for GitHub/GitLab/Codeberg hosted mods

Currently, OneLauncher can automatically update mods published on Modrinth. It would be great to extend this functionality to mods hosted on Git platforms (e.g. GitHub, GitLab, Codeberg) by allowing users to specify an “update URL.” Whenever a new release (tag) is published at that URL, OneLauncher should detect it and update the mod package just as it does for Modrinth mods.
