Implement particle pooling functionality for performance optimization

[Copilot]

This PR implements the particle pooling functionality using the object pool pattern to significantly reduce garbage collection overhead.

Implementation Details

1. New ParticlePool Class

   • Created a dedicated pool manager for particles
   • Pre-allocates particles during initialization (default: 100)
   • Automatically grows the pool when needed (default: 20 particles at a time)
   • Provides GetParticle() and ReleaseParticle() methods for efficient particle reuse
   • Resets particles to default state when returned to the pool

2. Modified Emitter2D Class

   • Added ParticlePool as a protected field
   • Updated constructor to initialize the particle pool with configurable capacity
   • Modified CreateNewParticle() to get particles from the pool instead of instantiating new ones
   • Updated UpdateParticles() to return "dead" particles to the pool instead of just removing them
   • Enhanced Trigger() to properly return existing particles to the pool when the emitter is reset

3. Project Structure

   • Added new Pools directory for object pool implementations
   • Updated project file to include the new directory

Benefits

• Reduces memory pressure from constant particle allocation/deallocation
• Minimizes garbage collection pauses which can impact frame rate
• Maintains the same public API so existing code doesn't need changes
• Configurable pool sizes to balance memory usage vs. allocation frequency

Fixes #1.

Warning

Firewall rules blocked me from connecting to one or more addresses

I tried to connect to the following addresses, but was blocked by firewall rules:

• crl3.digicert.com
  • Triggering command: dotnet build (dns block)
• crl4.digicert.com
  • Triggering command: dotnet build (dns block)
• ocsp.digicert.com
  • Triggering command: dotnet build (dns block)
• s.symcb.com
  • Triggering command: dotnet build (dns block)
• s.symcd.com
  • Triggering command: dotnet build (dns block)
• ts-crl.ws.symantec.com
  • Triggering command: dotnet build (dns block)
• ts-ocsp.ws.symantec.com
  • Triggering command: dotnet build (dns block)
• www.nuget.org
  • Triggering command: dotnet build (dns block)
  • Triggering command: dotnet build -p:BuildContentProjects=false (dns block)
  • Triggering command: dotnet build -p:MonoGameMGCB=false (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to my firewall allow list

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