Enhancement: Implement IntProvider

[localheinz]

This PR

• implements DataProvider\IntProvider

Follows #326.

[codecov]

Codecov Report

Merging #335 into main will not change coverage.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##                main      #335   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
- Complexity        65        73    +8     
===========================================
  Files              8         9    +1     
  Lines            227       253   +26     
===========================================
+ Hits             227       253   +26     

Impacted Files	Coverage Δ	Complexity Δ
src/DataProvider/IntProvider.php	100.00% <100.00%> (ø)	8.00 <8.00> (?)

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