excaliburjs / Excalibur / 9704956178

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perf: Reduce allocations on the hot path (#3111)

This PR takes a stab at a lot of the hot path allocations in excalibur improving performance significantly (numbers will be forthcoming with the new broadphase updates)

- New `RentalPool` type for sparse object pooling
- Perf improvements: Hot path allocations
  * Reduce State/Transform stack hot path allocations in graphics context
  * Reduce Transform allocations
  * Reduce AffineMatrix allocations

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