feat: ensure compatibility on field numbers

[Kybxd]

• close protogen: guarantee message field's Tag Number compatibility #218
• close protogen: add field number prop #230

[codecov]

Codecov Report

❌ Patch coverage is 89.47368% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 74.14%. Comparing base (fe37408) to head (1755b09).

Files with missing lines	Patch %	Lines
internal/protogen/exporter.go	91.30%	1 Missing and 5 partials ⚠️
internal/protogen/protogen.go	71.42%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #358      +/-   ##
==========================================
+ Coverage   74.02%   74.14%   +0.12%     
==========================================
  Files          87       87              
  Lines        8599     8655      +56     
==========================================
+ Hits         6365     6417      +52     
- Misses       1685     1687       +2     
- Partials      549      551       +2     

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