Fix plugin parsing for non-Skyrim files

[erri120]

Resolves #526

[codecov]

Codecov Report

Merging #529 (2e5060a) into main (094899c) will increase coverage by 69.80%.
The diff coverage is 80.39%.

Additional details and impacted files

@@            Coverage Diff            @@
##           main     #529       +/-   ##
=========================================
+ Coverage      0   69.80%   +69.80%     
=========================================
  Files         0      566      +566     
  Lines         0    15655    +15655     
  Branches      0     1089     +1089     
=========================================
+ Hits          0    10928    +10928     
- Misses        0     4448     +4448     
- Partials      0      279      +279     

Flag	Coverage Δ
Linux	69.00% <80.39%> (?)
Windows	68.84% <80.39%> (?)
clean_environment_tests	69.79% <80.39%> (?)

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

Files Changed	Coverage Δ
...usMods.Games.BethesdaGameStudios/PluginAnalyzer.cs	80.35% <80.39%> (ø)

... and 565 files with indirect coverage changes