Porting PyAST2CAST to tree sitter

[titomeister]

The current Python to GroMEt pipeline uses the Python AST to generate CAST, which is then used to generate Gromet.

We want to switch from using the Python AST to using tree sitter to generate CAST.

Tasks

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1. Python tree sitter: Assignment #497
   Code2FN +1
   
2. Python tree sitter: Arithmetic #523
   Code2FN +1
   
3. Python tree sitter: Functions #500
   Code2FN +1
   
4. Python tree sitter: Conditionals #499
   Code2FN +1
   
5. Python tree sitter: Loops #498
   Code2FN +1
   
6. Python tree sitter: Comprehensions & Lambdas #779
   4 of 4
   +0
   
7. Python tree sitter: Imports #804
   4 of 4
   Code2FN lang/Python +2
   
8. Python tree sitter: Classes #805
   2 of 2
   lang/Python +1
   
9. Python tree sitter: List Processing #841
   3 of 3
   Code2FN +1
   
10. Python tree sitter: remove PyAST component #853
    Code2FN +1
    
11. Python tree sitter: Compound Conditionals #875
    0 of 2
    Code2FN +1
    

[titomeister]

Update 9/29

• Assignment done.
• Working on Arithmetic (operations) next

[myedibleenso]

@titomeister , please add additional idioms to our task list.