add parser accepting string config

[K20shores]

musica needs to be able to parse string content. When I moved the v1 parser from public to private headers, I removed that capability. This adds it back

• make fmt a private implementation header in detail
• make v0 translate each reaction type to it's corresponding reaction type and not translating to user defined (where applicable), not adding PHOTO., LOSS., USER., EMIS.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 83.33333% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 88.93%. Comparing base (04d2f08) to head (842f7d3).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/parse.cpp	61.53%	5 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #285       +/-   ##
===========================================
+ Coverage   31.57%   88.93%   +57.35%     
===========================================
  Files           4       38       +34     
  Lines          19     1627     +1608     
===========================================
+ Hits            6     1447     +1441     
- Misses         13      180      +167     

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