Port `Demos` / `Performance` / `StaticParticlesRetained`

[SableRaf]

Port the StaticParticlesRetained example from Java to Python using the mewnala library.

Check out the README for more information on how to contribute to this porting effort.

Source

https://github.com/processing/processing-examples-mewnala/tree/main/Demos/Performance/StaticParticlesRetained

Tasks

• Locate the example source code (Demos/Performance/StaticParticlesRetained)
• Port the code to Python (using mewnala)
• Verify the sketch runs correctly (report any issues)
• Make a pull request with the changes (linked to this issue)

Blockers

Add links to any relevant issues or pull requests that are blocking progress on this example in a comment below.