Add banner for development builds (#567)

[JonathanFeenstra]

This adds a banner at the bottom of the screen to show that the current build is a development/debug build as described in #567. In case of a debug build, it looks like this:

In case of an official (pre-)release, it shows the product version instead of the "Debug build" text.

For now, the banner is hard-coded into the MainWindow as discussed on Discord. This means the code needs to be removed before making a stable release, or updated to only display the banner if a stable release version is detected. The text is also hard-coded an not localised.

I noticed that Rider automatically made some whitespace changes in IconStyles.xaml. Let me know if I should remove those from the commit.

[JonathanFeenstra]

Note that this does not fully resolve #476 since the banner is only shown for development builds. For stable releases, it would still make sense to display the version elsewhere in the UI.

[codecov]

Codecov Report

Merging #574 (185d200) into main (f776c9d) will increase coverage by 68.09%.
The diff coverage is 94.44%.

Additional details and impacted files

@@            Coverage Diff            @@
##           main     #574       +/-   ##
=========================================
+ Coverage      0   68.09%   +68.09%     
=========================================
  Files         0      599      +599     
  Lines         0    16222    +16222     
  Branches      0     1086     +1086     
=========================================
+ Hits          0    11047    +11047     
- Misses        0     4895     +4895     
- Partials      0      280      +280     

Flag	Coverage Δ
Linux	67.33% <94.44%> (?)
Windows	67.26% <94.44%> (?)
clean_environment_tests	68.09% <94.44%> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
src/NexusMods.App.UI/Theme/IconStyles.xaml	97.14% <66.66%> (ø)
...entBuildBanner/DevelopmentBuildBannerView.axaml.cs	92.30% <92.30%> (ø)
...opmentBuildBanner/DevelopmentBuildBannerView.axaml	100.00% <100.00%> (ø)
src/NexusMods.App.UI/Services.cs	97.82% <100.00%> (ø)
src/NexusMods.App.UI/Windows/MainWindow.axaml	100.00% <100.00%> (ø)
src/NexusMods.App.UI/Windows/MainWindow.axaml.cs	85.00% <100.00%> (ø)
...rc/NexusMods.App.UI/Windows/MainWindowViewModel.cs	74.03% <100.00%> (ø)

... and 592 files with indirect coverage changes

[halgari]

For now, all builds are development, so this is fantastic. Thanks for the contribution!