Read list of bs versions from beatmods

[geefr]

As implemented for the tui script in #60 but in the main qbeat binary

• Users should only be able to set versions from this list
• Default version should be the latest
• Should add a version-upgrade command to qbeat to register against the latest version, and re-patch - Would be good to auto upgrade and preserve all mods if possible, or do something like modassistant with moving the old mods to a backup folder.

[ominitay]

In terms of the functionality, I suggest that two commands for the version are implemented. getVersions, and setVersion.

getVersions should do exactly what it sounds like: output an array of all accepted versions. The API already outputs a JSON array, so this could perhaps be passed on, maybe changed to be more user-readable.

setVersion should accept either a value from getVersions, or accept the value latest, which would, obviously, set it to the latest version. Doing things this way would ensure that QBeat remains non-interactive.

[geefr]

Functionality is implemented in beataroni so closing. Would accept pr for qbeat but extremely low priority.