feat: Add meta validators

[Stranger6667]

Resolves #442

[codecov]

Codecov Report

Attention: Patch coverage is 87.13450% with 22 lines in your changes missing coverage. Please review.

Project coverage is 85.37%. Comparing base (40e41f3) to head (e03ad8d).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
crates/jsonschema-py/src/lib.rs	0.00%	16 Missing ⚠️
crates/jsonschema/src/lib.rs	96.57%	5 Missing ⚠️
crates/jsonschema/src/compiler.rs	88.88%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #660      +/-   ##
==========================================
- Coverage   85.39%   85.37%   -0.03%     
==========================================
  Files          90       90              
  Lines       13818    13948     +130     
==========================================
+ Hits        11800    11908     +108     
- Misses       2018     2040      +22     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[codspeed-hq]

CodSpeed Performance Report

Merging #660 will not alter performance

_{Comparing dd/meta-validation (e03ad8d) with master (40e41f3)}

Summary

✅ 45 untouched benchmarks