Get off of our divergent bevy fork

Our particle solution is currently enabled by this work that has yet to be merged back into bevy: https://github.com/processing/bevy

We need to merge this or find a way to have this functionality without maintaining a fork ideally. We are here because we wanted to prove the functionality, but we want to move towards stability and removing this is a necessary step.

首先，追蹤 libprocessing 目前如何依賴分歧的 processing/bevy fork，以及粒子功能整合在哪裡。將該功能與上游 Bevy 專案進行比較，並確定是否可以在不使用該 fork 的情況下合併或取代它。在保留粒子行為的同時，不再需要維護分歧的 fork，即視為完成。