Added the AI assist badge to readme files. Currently, I've done it for all packges for consistency, but if it is preferred to just have it in the main flame package, plmk and I'll update the PR.
behavior_tree
flame_behavior_tree
First pass on adding behavior tree for flame. This PR adds 2 packages: - behavior_tree: A pure dart implementation of behavior tree. - flame_behavior_tree: A bridge package that integrates behavior_tree with flame. Demo: https://github.com/flame-engine/flame/assets/33748002/1d2b00ab-1b6e-406e-9052-a24370c8f1ab