add version info at the bottom of the window

Added first setup wizard, rolled back to .NET 6 LTS.

fix crash when opening global settings on WSL 1.1.6.0

Remove compact UI because of bad UX, fix crashes.

Companion script is now managed automatically and embedded into the main executable.

Fixed a bug where the program hangs when trying to use "Online install" option.

Visual fixes and tweaks, should address some of the feedback in #3.

• "Reset to defaults" buttons now work
• Initial work for 1.5
• Move to .NET 7
• Update dependency

WARNING: companion.pl got updated, be sure to replace it.

Make window smaller when only one distro is installed

Per-distro settings should not be glitchy anymore.