Add docstring support.

[azteca1998]

No description provided.

[github-actions]

Benchmarking factorial

Compiling factorial (factorial.con)
Finished release in 31.864983ms
Running 5000000 iterations
Using input value: 20
Concrete Result = 2432902008176640000 Time taken : 59.50 ms
Rust Result = 2432902008176640000 Time taken : 60.41 ms

Benchmarking fib

Compiling fib (fib.con)
Finished release in 27.701805ms
Running 5000 iterations
Using input value: 20
Concrete Result = 6765 Time taken : 136.60 ms
Rust Result = 6765 Time taken : 85.80 ms

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 96.00000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 63.27%. Comparing base (50daeeb) to head (6f7e18b).

Files with missing lines	Patch %	Lines
src/parser/mod.rs	96.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #158      +/-   ##
==========================================
+ Coverage   62.92%   63.27%   +0.34%     
==========================================
  Files          20       20              
  Lines        4734     4784      +50     
==========================================
+ Hits         2979     3027      +48     
- Misses       1755     1757       +2     

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