feat(parser): add parser combinators

[ecyrbe]

This is a Combinator Parser with a lot of goodies:

• advanced error handling for parsing errors
• parser introspection to give better hints to users about the errors
• multiple easy to understand primitives to create complex parsers

About recursive parsers (resolved)

we get recursive too deep and probably infinite error. i only see trampolines as a workaround. This means complexify a lot the library. Because this implies returning a `ParserFn` in the composed parsers and calling those in a loop.

solution

was simply to remove ParserFn constraint

Combinators in this PR:

• [ ] Helpers
  • [x] Parse
  • [x] ToString
• [ ] Combinators
  • [x] Literal
  • [x] NotLiteral
  • [x] Optional
  • [x] Many
  • [x] Many1
  • [x] Sequence
  • [x] EndOfInput
  • [x] Choice
  • [x] Or
  • [x] Not
  • [x] Whitespace
  • [x] Whitespaces
  • [x] Trim
  • [x] TrimLeft
  • [x] TrimRight
  • [x] Any
  • [x] CharRange
  • [x] Alpha
  • [x] AlphaNum
  • [x] Digit
  • [x] Digits
  • [x] Word
  • [x] SepBy
  • [x] Between
• [ ] Transformers
  • [x] Map
  • [x] MapError
  • [x] Skip