Refactor path utility

[MateuszKubuszok]

• allow replacing Path.Root.matching[Foo].select(bar) with Path(_.matching[Foo].select[Bar]) which is closer to how users would define them in DSL
• merge deriveRecursiveTransformationExpr with deriveRecursiveTransformationExprUpdatingRules by using defaults
• start keeping book for all the intermediate src we defined so far (they might be just src.field1.field1, but they might also be map( inner => ... ) // <-- inner which would allow us to access .everyItem and friend in field renaming

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.62%. Comparing base (f2cb2a6) to head (d4a1871).
Report is 84 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #613      +/-   ##
==========================================
- Coverage   86.79%   86.62%   -0.17%     
==========================================
  Files         155      155              
  Lines        6012     6042      +30     
  Branches      544      540       -4     
==========================================
+ Hits         5218     5234      +16     
- Misses        794      808      +14     

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