Parser change

[jClugstor]

Checklist

• [x ] Appropriate tests were added
• [x ] Any code changes were done in a way that does not break public API
• [x ] All documentation related to code changes were updated
• [x ] The new code follows the
  contributor guidelines, in particular the SciML Style Guide and
  COLPRAC.
• [x ] Any new documentation only uses public API

Additional context

This switches the parser library used to ParserCombinator.jl instead of Automa.jl.
Automa.jl does not support backtracking, which requires the regex machine it compiles to be unambiguous, or ambiguity errors can happen during the parsing. This makes it difficult to translate the grammar of Base Modelica to something it can use.

ParserCombinators is able to backtrack, which makes it easier to put the whole grammar in, even if it's ambiguous at points.

This should add all of the grammar found in the Base Modelica proposal.

This should make it actually feasible to add most of the more advanced Base Modelica things that need to be supported. Records, custom types, if statements, when equations etc. should be able to be parsed, but do not have Julia representations yet. But this makes it possible to implement them in the future.

Adresses #10

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.38%. Comparing base (08ca171) to head (e981e01).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##            main      #15       +/-   ##
==========================================
+ Coverage   1.58%   94.38%   +92.79%     
==========================================
  Files          4        4               
  Lines         63       89       +26     
==========================================
+ Hits           1       84       +83     
+ Misses        62        5       -57     

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