Add Interactive Play Interval Control to Mesa Visualization

[AdamZh0u]

Summary

This PR adds a slider control to dynamically adjust simulation speed in Mesa's visualization interface. #2497

Motive

• Fixed play interval was limiting user control
• Need flexible speed control for observing different phenomena

Implementation

• Added play interval slider (1ms-500ms)
• Made interval reactive for real-time updates
• Updated controllers to use dynamic interval

Usage Examples

The play interval slider appears automatically in the Controls panel of any Mesa visualization, no additional configuration needed.

• Before
  
• After
  

Additional Notes

• Maintains backward compatibility
• Safe range limits prevent performance issues

[github-actions]

Performance benchmarks:

Model	Size	Init time [95% CI]	Run time [95% CI]
BoltzmannWealth	small	🔵 +1.8% [+1.3%, +2.3%]	🔵 +0.7% [+0.6%, +0.8%]
BoltzmannWealth	large	🔵 +1.2% [+0.9%, +1.6%]	🔵 +0.3% [-0.2%, +0.7%]
Schelling	small	🔵 +1.0% [+0.8%, +1.2%]	🔵 +0.2% [+0.0%, +0.3%]
Schelling	large	🔵 +1.2% [+1.0%, +1.5%]	🔵 +0.0% [-0.4%, +0.5%]
WolfSheep	small	🔵 +0.6% [+0.4%, +0.8%]	🔵 +0.4% [+0.3%, +0.6%]
WolfSheep	large	🔵 +0.5% [+0.2%, +0.7%]	🔵 -0.4% [-1.7%, +0.8%]
BoidFlockers	small	🔴 +4.5% [+4.0%, +5.0%]	🔵 +1.7% [+0.8%, +2.7%]
BoidFlockers	large	🔴 +4.1% [+3.7%, +4.7%]	🔵 +1.2% [+0.5%, +2.2%]

[quaquel]

I like this PR, but I defer to @Corvince's view on it since he has been doing most of the work on the visualization stuff.

[Corvince]

Thanks for tagging me @quaquel, I wasn't looking into mesa a lot the last weeks, so this would have gone unnoticed by me. Nice, focused PR. I approved, but I also left a comment that you could try out @AdamZh0u . But it is also fine as-is.

[AdamZh0u]

@Corvince Thanks for the comments! You helped me realize an important point - the play_interval should be passed as a reactive object to controllers. Without maintaining its reactive nature, the controllers won't be able to dynamically update when the interval changes. I've tested the changes and confirmed that we can now adjust the simulation speed in real-time while the model is running.

[quaquel]

Thanks a lot for this! I'll give @Corvince time to have another look but it seems ready to be merged.