[WIP] add agent_radius to aabb obstacles

[nickydonna]

Testing agent_radius

Related to #50

[nickydonna]

@mockersf here I did a bit of a test, with the primitives, and added controls to the demo, and it seems to work fairly well. If you think it's ok I'll continue with the other ones

[nickydonna]

Here I'm unsure if we need to add it to both calculation in the Capsule

[nickydonna]

Just pushed support for avian3d, but is pretty slow. I'm trying to add expand to parry Trimesh, which should be faster, but right now, the example timesout with Direct update

[mockersf]

Looks good, thanks!

For primitives, could you check for CircularSector and CircularSegment? When I tried they required adjustments.

On my laptop the auto_navmesh_avian3d is working correctly on your PR, was it already timeouting before your changes?

[mockersf]

I added agent radius on the navmesh in #59

[nickydonna]

Thanks, sorry for not been able to fllow up on this,

[mockersf]

no worries!

I've been poked by someone else to do the second idea I spoke about in #50, and turns out it was easier that I thought!

Thanks for looking into it