Add ability to provie a custom constructor

[MateuszKubuszok]

TODO:

• create the type-level representation for storing arguments' names and types
• parse the type-level representation in TransformerCfg in macros
• convert function's/method's type-level representation + expression which contains the lambda into Product.Constructor
• wire custom constructor in ProductToProduct rule
• create withConstructor and withConstructorPartial in DSL
  • parse withConstructor(objectWithApply) (allowing multiple parameter lists) in Scala 2
  • parse withConstructor { (arg: Arg, arg2: Arg2) => ... } in Scala 2
  • parse withConstructor(objectWithApply) (allowing multiple parameter lists) in Scala 3
  • parse withConstructor { (arg: Arg, arg2: Arg2) => ... } in Scala 3
  • same for withConstructorPartial
• create TotalTransformerCustomConstructorSpec
• create PartialTransformerCustomConstructorSpec
• create MkDocs documentation
  • warning, mention 22-limit even on Scala 3
• create Scaladoc documentation

[codecov]

Codecov Report

Attention: 69 lines in your changes are missing coverage. Please review.

Comparison is base (a332903) 85.44% compared to head (f8524e9) 84.99%.

Files	Patch %	Lines
...ey/internal/compiletime/ChimneyTypesPlatform.scala	57.69%	11 Missing ⚠️
...ey/internal/compiletime/ChimneyTypesPlatform.scala	70.96%	9 Missing ⚠️
...internal/compiletime/dsl/utils/DslMacroUtils.scala	76.92%	9 Missing ⚠️
...letime/derivation/transformer/Configurations.scala	80.00%	9 Missing ⚠️
...etime/dsl/PartialTransformerDefinitionMacros.scala	66.66%	6 Missing ⚠️
...internal/compiletime/dsl/utils/DslMacroUtils.scala	89.13%	5 Missing ⚠️
...in/scala/io/scalaland/chimney/partial/Result.scala	0.00%	4 Missing ⚠️
...er/rules/TransformProductToProductRuleModule.scala	88.88%	3 Missing ⚠️
...compiletime/dsl/PartialTransformerIntoMacros.scala	66.66%	2 Missing ⚠️
...nd/chimney/internal/compiletime/ChimneyExprs.scala	33.33%	2 Missing ⚠️
... and 9 more

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #439      +/-   ##
==========================================
- Coverage   85.44%   84.99%   -0.45%     
==========================================
  Files         118      119       +1     
  Lines        4720     5186     +466     
  Branches      194      200       +6     
==========================================
+ Hits         4033     4408     +375     
- Misses        687      778      +91     

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