Add a menu to select between MMC/Modrinth format packs instead of the custom dialog
Treat 404s on requests to the Modrinth API as success, as the API returns a 404 if a hash was not found, and we don't want to retry the download in this case
Improve logging
It is all develop from now on, we no longer make stable releases.
This means no maintenance of version numbers and removal
of all the overhead associated with making stable releases.
MultiMC 6 might have a better system, but with how infrequent and stable
MultiMC releases are getting, there's no need to have a distinction
between `stable` and `develop` anymore.
This allows shortcuts to be created on Macs (which don't have a concept of desktop shortcuts) as well as Linux systems that don't support the desktop file specification. Also included a windows batch file implementation.
