Record types and validate

[dpi]

Fixes #39

And probably #27

Needed for XB work to display forms/validation, etc

[codecov-commenter]

Codecov Report

❌ Patch coverage is 62.50000% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 95.86%. Comparing base (2eda915) to head (0d409a7).

Files with missing lines	Patch %	Lines
src/Exception/Slots/BuildValidation.php	0.00%	5 Missing ⚠️
src/Attribute/ObjectType/Slots.php	80.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main      #42      +/-   ##
============================================
- Coverage     97.01%   95.86%   -1.15%     
- Complexity      207      214       +7     
============================================
  Files            31       32       +1     
  Lines           469      484      +15     
============================================
+ Hits            455      464       +9     
- Misses           14       20       +6     

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