Reflect planner component

[ogghead]

First, this is a super cool package -- thank you for creating this!

Changes

• Reflect the planner component for broader integration with plugins using component reflection

Testing

• Builds locally in my fork with cargo build
• Verified this allows bevy_dogoap and a component-reflection-based plugin to run in a game with both enabled

[ogghead]

Hi @victorb, would you be able to review this PR? Thank you!

[victorb]

Thank you and sorry for the delay! Will squeeze some other changes and do a release later :)