Async Core API: Resources (Custom Actions)

[btoron]

Implement async versions of resource custom actions (12 methods total).

Methods include: activate_route, deactivate_route, bulk_update_workzones, bulk_update_workskills, bulk_update_workschedules, bulk_update_inventories, find_matching_resources, find_urgent_resources, set_positions, get_last_known_positions, get_resources_in_area, find_nearby_activities.

See planned methods list in /Users/borja.toron/.claude/plans/magical-bouncing-curry.md