feat: improve cards navigation on Bevy3D

[adolfousier]

feat: improve agents card navigation on Bevy3D.

Missing keyboard navigation on GPU's

[adolfousier]

Fixed in v0.1.7: Added j/k and arrow key navigation for Bevy MC agent cards with visible border highlight, Enter to select/deselect agent (filters activity+tasks), Esc to deselect. Also fixed agent cards not scrollable (cards were stealing hover from container).