Use static references for localization, remove live localization updates

[Al12rs]

close #601

This PR removes live localization updates support and uses static compile safe references in axaml code.

• Changed all axaml references to static compile safe one that won't update on locale change.
• Removed all custom string update code required for live updating of strings both in the views and the C# code.
• Updated Docs to reflect the new simplified approach.
• Added ADR about not supporting live update of localized strings and asking users to restart the app instead.
• Moved a localized string referemce from XAML file to views to make it update.
• Removed the tests that checked if live translation changes worked correctly.

During implementation, a limitation of xaml stylesheet static references was found.
These are loaded before the locale is configured at startup, meaning that any localized strings referenced in these files will remain the default English even with restarts.
Localized strings can thus not be used in XAML stylesheet files.

I made cursory checks using Italian translations and things seem to work correctly.

[codecov]

Codecov Report

Merging #613 (10acde0) into main (b58cc97) will increase coverage by 68.12%.
The diff coverage is 71.42%.

@@            Coverage Diff            @@
##           main     #613       +/-   ##
=========================================
+ Coverage      0   68.12%   +68.12%     
=========================================
  Files         0      597      +597     
  Lines         0    16408    +16408     
  Branches      0     1086     +1086     
=========================================
+ Hits          0    11178    +11178     
- Misses        0     4954     +4954     
- Partials      0      276      +276     

Flag	Coverage Δ
Linux	67.40% <71.42%> (?)
Windows	67.30% <71.42%> (?)
clean_environment_tests	68.11% <71.42%> (?)

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Files Changed	Coverage
src/NexusMods.App.UI/App.axaml.cs	0.00%
...Controls/Buttons/RoundedButton/RoundedButton.axaml	0.00%
...usMods.App.UI/Controls/GameWidget/GameWidget.axaml	0.00%
src/NexusMods.App.UI/Controls/Pills/Premium.axaml	0.00%
...pp.UI/LeftMenu/Game/GameLeftMenuDesignViewModel.cs	0.00%
...ys/Download/Cancel/CancelDownloadOverlayView.axaml	0.00%
....App.UI/Overlays/Login/NexusLoginOverlayView.axaml	0.00%
....App.UI/RightContent/Downloads/CompletedView.axaml	0.00%
...ds.App.UI/RightContent/Downloads/HistoryView.axaml	0.00%
...tent/Downloads/ViewModels/DownloadTaskViewModel.cs	ø
... and 16 more