v0.1.67

• Add vf/ref operator to refer to existing components
• Add vf/del operator to flag an component for deletion
• Add jolt
• Add raycast
• Create VybePOpaque to represent memory segments
• GLTF loading now also loads physics (statically)
  • Using the axis aligned bounding box (AABB) method only
• Allow dynamic flecs queries
• Add Flecs observers
• Allow datalog-like queries using Flecs
  • Query scopes
  • Variables
  • Sources
  • See https://github.com/SanderMertens/flecs/blob/v4/docs/Queries.md
• :vg/dynamic converts meshes to dynamic objects (AABB)