[WIP] Simulator Stepping Functionality

[Eric-Vin]

Description

Adds the ability to run simulations in a stepped mode, using a context manager.

Issue Link

N/A

Checklist

• I have tested the changes locally via pytest and/or other means
• I have added or updated relevant documentation
• I have autoformatted the code with black and isort
• I have added test cases (if applicable)

Additional Notes

N/A

[codecov]

Codecov Report

Attention: Patch coverage is 97.16981% with 3 lines in your changes missing coverage. Please review.

Project coverage is 91.36%. Comparing base (4ae8ee2) to head (a452067).

Files with missing lines	Patch %	Lines
src/scenic/core/simulators.py	97.16%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #312      +/-   ##
==========================================
- Coverage   91.38%   91.36%   -0.02%     
==========================================
  Files          54       54              
  Lines       13555    13589      +34     
==========================================
+ Hits        12387    12416      +29     
- Misses       1168     1173       +5     

Files with missing lines	Coverage Δ
src/scenic/core/simulators.py	96.55% <97.16%> (+0.05%)	⬆️

... and 4 files with indirect coverage changes