Reorganize advanced examples: wolf_sheep and sugarscape_g1mt

[quaquel]

This PR reorganizes wolf_sheep and sugarscae_g1mt using agents.py, model.py, and app.py. It cleanup redundant files and updates the readme. For wolf_sheep, it adds a Solara front end because it did not exist yet.

Below is a screenshot. Grass visualization is not great yet. The matplotlib drawing of agents passes s (the size of the marker) but not marker (the shape of the marker). So various updates in the solara side are needed first before we can return to make this solara front end nicer.

Note how I reused #2408 for the dropdown chooser for grass regrowth.

[github-actions]

Performance benchmarks:

Model	Size	Init time [95% CI]	Run time [95% CI]
BoltzmannWealth	small	🔵 -0.8% [-1.7%, +0.1%]	🔵 -1.0% [-1.1%, -0.8%]
BoltzmannWealth	large	🔵 -1.2% [-1.7%, -0.8%]	🔵 -1.9% [-2.5%, -1.3%]
Schelling	small	🔵 +0.4% [-0.0%, +0.8%]	🔵 +1.1% [+0.9%, +1.3%]
Schelling	large	🔵 +2.2% [+1.5%, +2.8%]	🔵 +2.4% [+1.5%, +3.3%]
WolfSheep	small	🔵 +0.2% [+0.1%, +0.4%]	🔵 +1.0% [+0.8%, +1.2%]
WolfSheep	large	🔵 -0.0% [-0.2%, +0.2%]	🔵 +0.7% [+0.2%, +1.2%]
BoidFlockers	small	🔵 +2.4% [+1.7%, +3.0%]	🔵 +1.9% [+1.2%, +2.6%]
BoidFlockers	large	🔵 +2.5% [+1.9%, +3.1%]	🔵 +2.6% [+2.1%, +3.3%]

[EwoutH]

Did you properly move / remove the old files? It seems like there are now too many files, especially in WolfSheep

[EwoutH]

Don’t we have a nice random cell function for this?

(can also be done in another PR, but now that we’re looking at it)

[quaquel]

yes you can do self.grid.all_cells.select_random_empty_cell() or something close to that.

I'll leave that for a seperate PR that goes into the code itself and cleans it up. Let's keep this focussed on the reorganization.

[quaquel]

Did you properly move / remove the old files? It seems like there are now too many files, especially in WolfSheep

I forgot that folder. The rest is clean