For loop syntax

[JulianGCalderon]

• Changes ForStmt with new sintax elements
• Changes grammar.lalrpop to parse new syntax
• Adds tests and examples for three common use cases:
  • regular for
  • for as while
  • for as loop
• Adds syntax sugar to for as while and for as loop

[github-actions[bot]]

Benchmarking factorial

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 58.05%. Comparing base (53cddd9) to head (c3d0fd5).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #102 +/- ## ========================================== + Coverage 57.35% 58.05% +0.69% ========================================== Files 34 34 Lines 3956 4022 +66 ========================================== + Hits 2269 2335 +66 Misses 1687 1687 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.