Automatic release creation for multi-arch update support + Velopack channels for arm64

[yungcomputerchair]

• Assign arm64 builds to *-arm64 Velopack channels to fix collision with x64 channels
  • To avoid breaking auto-update for x64 users, their channels stay the default (unsuffixed, e.g. linux)
• Add an optional release stage to build-all.yml to create a GitHub release for the version with all files staged in the right place

Tested on my fork: https://github.com/yungcomputerchair/OSFRLauncher/releases/tag/v1.1.1
The auto-update worked great on both Win ARM and Linux x64.

I'm gonna auto-merge this one too (sorry) to get the password security fix in and create a release with it.

[StimpyDev]

Please add OSFRLauncher-1.1.1-full.nupkg in the release tab, otherwise updating will fail.

[yungcomputerchair]

Please add OSFRLauncher-1.1.1-full.nupkg in the release tab, otherwise updating will fail.

Not sure what you mean... the full builds are per-arch, and they are there:

[StimpyDev]

[yungcomputerchair]

ofc Windows x64 breaks the pattern... can you try again?

[StimpyDev]

ofc Windows x64 breaks the pattern... can you try again?

It updates but the version label doesn't change, it keeps trying to update to 1.1.1.

Nvm ur good to go man

[yungcomputerchair]

Thanks for the catch Stimpy! Life saver