New required field handling

[Mark90]

Relates to #9

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After

[sentry]

Codecov Report

❌ Patch coverage is 94.11765% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 92.50%. Comparing base (3c246b3) to head (04b9aa5).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
pydantic_forms/utils/required.py	94.23%	2 Missing and 1 partial ⚠️
pydantic_forms/core/shared.py	90.90%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #56      +/-   ##
==========================================
+ Coverage   92.33%   92.50%   +0.16%     
==========================================
  Files          32       34       +2     
  Lines         652      720      +68     
  Branches       69       80      +11     
==========================================
+ Hits          602      666      +64     
- Misses         46       48       +2     
- Partials        4        6       +2     

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