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]

Codecov Report

All modified and coverable lines are covered by tests ✅

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

Additional details and impacted files

@@           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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