Fix BankReserves crash and deprecation warnings

[Rishabh-77]

Fix Bank Reserves Crash and Deprecation Warnings

Description

This PR addresses several critical issues in the bank_reserves example to ensure it is GSoC-ready and follows modern Mesa standards.

Fixes

• Race Condition Crash: Implemented ThreadSafeDataCollector in model.py to prevent ValueError during Solara visualization updates (Fixes crash "ugly browser error box").
• Deprecation Warnings: Updated agent_portrayal in app.py to return AgentPortrayalStyle objects instead of dictionaries.
• Initialization: Aligned BankReservesModel default parameters with SolaraViz slider defaults to prevent initial state mismatch (the "two dots" bug).
• Batch Run: Updated model __init__ to accept rng and kwargs, fixing batch_run.py failures.

Related Issue

Fixes #318

[tpike3]

This is fixed with #317, but is should be just rng, seed is deprecated.

[tpike3]

Thanks @Rishabh-77~ Your solution highlights some issues with this example that I think has an easier fix.

I think the actual issue is that model.py init_people is set at 2 while the slider is set at 25, which makes it appear like a bug due to the discrepancy. (You have to hit reset for the slider variable to be passed as the kwarg)

As for the threading, for visualization race condition Solara has a threads option which is captured in mesa as a check box, but it is not turned on by default. However, you can enable it with adding use_threads=True in the SolaraViz

If you want you want update the init_people=25 and if you want to show the capability of threading set use_threads=True I think that solution would be more consistent with how Mesa is constructed.

Thank you again for the PR!