[editor] Entity Component Inspector

[cheater78]

rework and extend the current Inspector to work with an AssetManager in the EditorRuntime, hot swappable Assets!

• [ ] Inspector Design to fit editor structure
• [ ] UI Representation of Components and Assets
• [ ] Editor Datastructures to allow modifying data live
• [ ] modular Content Panel

[cheater78]

added some ImGui abstractions, maybe move to seperate lib in the future