refactor(toml): add Scanner match() method

[timreichen]

This allows for more complex regexps match checks.

[codecov]

Codecov Report

Attention: Patch coverage is 91.30435% with 6 lines in your changes missing coverage. Please review.

Project coverage is 95.20%. Comparing base (b5a5fe4) to head (b8a8bf6).

Files with missing lines	Patch %	Lines
toml/_parser.ts	91.30%	3 Missing and 3 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6538      +/-   ##
==========================================
- Coverage   95.21%   95.20%   -0.02%     
==========================================
  Files         577      577              
  Lines       43381    43333      -48     
  Branches     6487     6469      -18     
==========================================
- Hits        41307    41255      -52     
- Misses       2034     2035       +1     
- Partials       40       43       +3     

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