BLD: Add meson

[bashtage]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 78.72340% with 10 lines in your changes missing coverage. Please review.
✅ Project coverage is 99.37%. Comparing base (764475a) to head (94992ea).

Files with missing lines	Patch %	Lines
linearmodels/_build/git_version.py	66.66%	3 Missing and 5 partials ⚠️
linearmodels/tests/test_build.py	91.30%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #666      +/-   ##
==========================================
- Coverage   99.57%   99.37%   -0.21%     
==========================================
  Files          99      101       +2     
  Lines       17278    17325      +47     
  Branches     1419     1424       +5     
==========================================
+ Hits        17205    17217      +12     
- Misses         27       56      +29     
- Partials       46       52       +6     

Flag	Coverage Δ
adder	99.36% <78.72%> (-0.20%)	⬇️
subtractor	99.36% <78.72%> (-0.20%)	⬇️

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