chore: improve firework show performance and ensure synchronization

[btwlouis]

Summary
This pull request improves the firework show system for better performance, more natural delays, and ensures synchronization for all players, including those who rejoin during the show.

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Key Changes

1. Refactored Client-Side Logic

   • Removed redundant TriggerServerEvent calls.
   • Optimized particle asset loading with a centralized function (RequestPtfxAsset).
   • Added natural delays for starting rockets to improve realism.

2. Improved Server-Side Synchronization

   • Ensured players rejoining during the firework show will automatically sync and start the show.
   • Added a more robust control for stopping and starting the firework show.

3. New Config

   • Created a centralized configuration (Config) to define particle effects and firework positions, reducing hard-coded values.

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Benefits

• More Performant: Eliminates unnecessary loops and server events.
• Fully Synced: Players joining late now experience the firework show correctly.
• More Natural: Adds random delays to firework launches for better visual appeal.

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Testing

• All features have been tested successfully:
  • Firework show starts/stops as expected.
  • Rejoining players sync automatically.
  • Config changes take effect without issues.