Update tutorial and viz

[tpike3]

• Update tutorial to be SIR model
• Update Viz to allow for different markers; default agent to circle -Update tests
• Update tests

[codecov]

Codecov Report

Attention: Patch coverage is 67.85714% with 9 lines in your changes missing coverage. Please review.

Project coverage is 78.30%. Comparing base (ce501b6) to head (ac37dd9).
Report is 30 commits behind head on main.

Files	Patch %	Lines
mesa_geo/visualization/leaflet_viz.py	53.33%	5 Missing and 2 partials ⚠️
mesa_geo/visualization/geojupyter_viz.py	84.61%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #217      +/-   ##
==========================================
+ Coverage   78.21%   78.30%   +0.08%     
==========================================
  Files          10        9       -1     
  Lines         693      765      +72     
  Branches      151      173      +22     
==========================================
+ Hits          542      599      +57     
- Misses        127      131       +4     
- Partials       24       35      +11     

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[wang-boyu]

Tutorial and tests can be run successfully. @rht @EwoutH would you like to take a look at this PR too?

[rht]

What is missing is to rename JupyterViz to SolaraViz.

[EwoutH]

Maybe add a short "What you will learn" section at the beginning. Otherwise looks good!