Produce self-contained builds of the app

[Tyrrrz]

Produce self-contained builds of LightBulb that don't require manual installation of .NET, with the downside of a much larger download size.

With the usage of Avalonia, this has become viable as it has a lot smaller file size overhead compared to WPF.

File size difference:

• 34.3mb vs 9.5mb (before) for Installer
• 43mb vs 11.5mb (before) for Portable (and auto-update)

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 96.35%. Comparing base (03218e8) to head (4b45e3e).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #292 +/- ## ======================================= Coverage 96.35% 96.35% ======================================= Files 7 7 Lines 192 192 Branches 15 15 ======================================= Hits 185 185 Misses 6 6 Partials 1 1 ```

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