refactor(toml): rewrite deepAssignWithTable

[timreichen]

This PR splits deepAssignWithTable() into deepAssignTable() and deepAssignTableArray() and BlockParseResultBody into Block, Table, TableArray types.
This improves the readability and allows for a reduction in toml().
This PR also fixes a type bug where the or() parser combinator only allowed the same generic for parsers.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.53%. Comparing base (2a059d9) to head (8950cf8).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6580      +/-   ##
==========================================
- Coverage   94.54%   94.53%   -0.01%     
==========================================
  Files         580      580              
  Lines       43891    43897       +6     
  Branches     6501     6504       +3     
==========================================
+ Hits        41496    41499       +3     
- Misses       2352     2355       +3     
  Partials       43       43              

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