Allow installers to set mod metadata

[erri120]

Resolves #1018.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 58.33333% with 5 lines in your changes are missing coverage. Please review.

Project coverage is 56.80%. Comparing base (3c9e15b) to head (247dc1a).

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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1020      +/-   ##
==========================================
+ Coverage   56.06%   56.80%   +0.73%     
==========================================
  Files         645      645              
  Lines       21244    21248       +4     
  Branches     1655     1656       +1     
==========================================
+ Hits        11910    12069     +159     
+ Misses       8941     8783     -158     
- Partials      393      396       +3     

Flag	Coverage Δ
Linux	56.08% <58.33%> (?)
Windows	56.04% <58.33%> (+0.06%)	⬆️
clean_environment_tests	56.78% <58.33%> (+0.72%)	⬆️
macOS	55.49% <58.33%> (+0.04%)	⬆️

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

Files	Coverage Δ
...Mods.Abstractions.Installers/ModInstallerResult.cs	85.71% <100.00%> (+2.38%)	⬆️
...ctions/NexusMods.Abstractions.Loadouts/Mods/Mod.cs	100.00% <100.00%> (ø)
src/NexusMods.DataModel/ArchiveInstaller.cs	69.33% <50.00%> (-0.74%)	⬇️

... and 21 files with indirect coverage changes

[github-actions]

This PR conflicts with main. You need to rebase the PR before it can be merged.

[github-actions]

This PR doesn't conflict with main anymore. It can be merged after all status checks have passed and it has been reviewed.