Add print and println functions

[printfn]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 79.78142% with 37 lines in your changes missing coverage. Please review.

Project coverage is 82.45%. Comparing base (518e79a) to head (e9f7de4).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
core/src/value.rs	73.52%	9 Missing ⚠️
cli/src/main.rs	0.00%	8 Missing ⚠️
core/src/lib.rs	33.33%	8 Missing ⚠️
core/src/value/built_in_function.rs	0.00%	4 Missing ⚠️
wasm/src/lib.rs	0.00%	3 Missing ⚠️
cli/src/context.rs	0.00%	2 Missing ⚠️
core/src/ast.rs	97.46%	2 Missing ⚠️
core/src/eval.rs	87.50%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #348      +/-   ##
==========================================
- Coverage   82.64%   82.45%   -0.19%     
==========================================
  Files          52       52              
  Lines       14430    14508      +78     
==========================================
+ Hits        11925    11963      +38     
- Misses       2505     2545      +40     

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