Add feature to validate map types

[tetron]

No description provided.

[tetron]

validate.py includes recognizes and validates 'map' types.

[codecov]

Codecov Report

Attention: Patch coverage is 4.76190% with 20 lines in your changes missing coverage. Please review.

Project coverage is 83.03%. Comparing base (98e2751) to head (5e9f8c2).
Report is 44 commits behind head on main.

Files with missing lines	Patch %	Lines
schema_salad/validate.py	4.76%	19 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #848      +/-   ##
==========================================
- Coverage   83.37%   83.03%   -0.35%     
==========================================
  Files          22       22              
  Lines        4813     4833      +20     
  Branches     1302     1310       +8     
==========================================
  Hits         4013     4013              
- Misses        526      545      +19     
- Partials      274      275       +1     

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