feat: Portable PDB source files list

[vaind]

"Alternative 2" of #725

[loewenheim]

This doesn't look right. I think you would have to append the name here?

[vaind]

The issue here, why I was trying what I did in this original version you've reviewed, was that FileInfo required reference - it didn't own the data. PPDB get_document() on the other hand produces a String. This was incompatible and due to lifetime restrictions, there was no level in the PPDB API to produce correct FileInfo values whose lifetime could be based on 'data. Therefore, after discussing with @Swatinem, I had to refactor FileInfo (and FileEntry, although that wasn't strictly necessary in this case) to use Cow. This is a breaking change if anyone is constructing FileInfo/FileEntry directly or reads its public properties instead of getters.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 87.75510% with 18 lines in your changes missing coverage. Please review.
✅ Project coverage is 72.93%. Comparing base (0b39652) to head (903a645).
⚠️ Report is 271 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #729      +/-   ##
==========================================
+ Coverage   72.76%   72.93%   +0.17%     
==========================================
  Files          70       69       -1     
  Lines       14747    14726      -21     
==========================================
+ Hits        10731    10741      +10     
+ Misses       4016     3985      -31     

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[loewenheim]

Very nice!

[Swatinem]

Pls also add a changelog entry for this :-)

[loewenheim]

My bad, forgot about that before merging