PR #179 - Type hints for reasoning module + Mesa 4.x compatibility fixes

[abhinavk0220]

Hey everyone! Wanted to share a quick update on PR #179.

What's in the PR

Added comprehensive type hints and Args/Returns docstrings to the
entire reasoning module Reasoning, CoTReasoning, ReActReasoning,
and ReWOOReasoning. Small change individually but makes the codebase
significantly easier to navigate for new contributors and IDE tooling.

The Mesa 4.x situation and why it keeps coming up

While syncing with upstream main before opening this PR, I noticed
that mesa.space imports had crept back into several files — both
source and test files. This is the same issue PR #153 addresses, but
it keeps resurfacing because contributors are still opening PRs written
against the old Mesa 3.x API, and when those get merged they bring
mesa.space back.

My approach has been: rather than just fixing our own files and
moving on, each time I sync with upstream I do a full audit and fix
every regression I find source files, test files, conftest,
recording utilities, everything. The idea is to make the codebase
consistently Mesa 4.x-ready rather than having islands of fixed code
surrounded by broken imports.

This PR fixes:

• mesa.space → mesa.discrete_space / mesa.experimental.continuous_space
  in llm_agent.py, inbuilt_tools.py, conftest.py, test files
• model.steps → model._time in record_model.py (Mesa 4.x step counter)
• Model(seed=42) → Model() in test_parallel_stepping.py
• Removed SingleGrid/MultiGrid branches entirely from inbuilt_tools.py

The long-term fix is obviously getting PR #153 merged, which addresses
this at the root. But until then, happy to keep catching these regressions.

PR: #179