Remove repo-managed WinGet publish workflows (#4501)

Restore self-contained Windows App SDK packaging

The shared-target-framework refactor moved the Windows App SDK self-contained settings into Directory.Build.props behind a condition that depends on TargetFramework being set. Because Directory.Build.props is evaluated before UniGetUI.csproj assigns TargetFramework, the app project stopped evaluating as self-contained and no longer bundled Microsoft.WindowsAppRuntime.dll in release artifacts.

Move the self-contained Windows App SDK settings into UniGetUI.csproj so they are evaluated after the app TargetFramework is known and the runtime payload is bundled again.

Fixes #4487.

feat(avalonia): experimental cross-platform Avalonia port

Introduce an experimental Avalonia UI implementation, infrastructure, pages, and settings flows.\n\nAlso includes:\n- single-instance forwarding and startup/dependency handling\n- auto-update gating (battery, battery-saver, metered)\n- translation key alignment and Avalonia warning cleanup\n- CI updates to validate Avalonia formatting/style/build separately

Cache WinGet CLI payload in release workflow

update version number

fix tests not passing

Update version number

Undo changes that could potentially be behind the crashes on 3.3.4

@Simek was right

update version number