Add back Left Menus and Left Menu Navigation

[Al12rs]

closes #932

• Added WorkspaceId to ILeftMenuViewModel and pass WorkspaceContructor etc to LeftMenuViewModel implementations.
  • This is to allow Left Menus to have an associated workspace and have the ability to Open pages on it.
• Added ILeftMenuFactorys for Loadout, Home and Downloads Left Menus.
• Added IWorkspaceAttachmentsFactoryManager that uses ILeftMenuFactories to return attached ILeftMenuViewModels.
• Added Pages entries for My Games My Mods and In Progress pages on LeftMenus
  • Implemented opening the pages in the Workspace.
• Added OpenPageBehavior.PrimaryDefault and OpenPageBehavior.SecondaryDefault behaviours, for right click and middle click.
• Added methods to select a specific tab from inside WorkspaceViewModel, necessary to make sure to bring opened page into view if it replacing an existing tab.
• Added check to avoid creating a new page when replacing a tab, if the tab has exactly the same data.
• Automatically open the Home Workspace when opening the app (so we don't have empty workspace for now)

Skipped the workspace name stuff for this PR.
I'm actually thinking of having a property on the Workspace itself, not unlike the TabName.

[codecov-commenter]

Codecov Report

Attention: 104 lines in your changes are missing coverage. Please review.

Comparison is base (8bd7919) 55.28% compared to head (f10165e) 58.57%.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #939      +/-   ##
==========================================
+ Coverage   55.28%   58.57%   +3.28%     
==========================================
  Files         620      626       +6     
  Lines       20058    20177     +119     
  Branches     1545     1551       +6     
==========================================
+ Hits        11089    11818     +729     
+ Misses       8620     8003     -617     
- Partials      349      356       +7     

Flag	Coverage Δ
Linux	57.90% <36.19%> (+3.16%)	⬆️
Windows	57.81% <36.19%> (+3.25%)	⬆️
clean_environment_tests	58.55% <36.19%> (+3.28%)	⬆️
network_tests	?
networking_tests	?

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

Files	Coverage Δ
...usMods.App.UI/LeftMenu/Home/HomeLeftMenuFactory.cs	100.00% <100.00%> (ø)
src/NexusMods.App.UI/LeftMenu/ILeftMenuFactory.cs	100.00% <100.00%> (ø)
src/NexusMods.App.UI/Services.cs	98.44% <100.00%> (+0.10%)	⬆️
...eAttachments/WorkspaceAttachmentsFactoryManager.cs	100.00% <100.00%> (ø)
...pp.UI/LeftMenu/Home/HomeLeftMenuDesignViewModel.cs	0.00% <0.00%> (ø)
.../NexusMods.App.UI/Controls/Spine/SpineViewModel.cs	67.87% <92.59%> (+20.10%)	⬆️
...Menu/Downloads/DownloadsLeftMenuDesignViewModel.cs	0.00% <0.00%> (ø)
....UI/LeftMenu/Downloads/DownloadsLeftMenuFactory.cs	25.00% <25.00%> (ø)
...exusMods.App.UI/LeftMenu/EmptyLeftMenuViewModel.cs	0.00% <0.00%> (ø)
....App.UI/LeftMenu/Loadout/LoadoutLeftMenuFactory.cs	25.00% <25.00%> (ø)
... and 7 more

... and 42 files with indirect coverage changes