Capability-based task routing

[joshualamerton]

TaskMesh should support routing tasks based on agent capabilities rather than simple queue order.

Goals:

• define capability metadata for agents
• match tasks to agents by capability
• add example usage in the demo

Success criteria:
Tasks are routed to the most appropriate worker agent.

[alimhuduev-tech]

@joshualamerton! I think this is a really cool feature. I'd love to pick this up as a good first issue. Could you assign it to me?
Could you also point me to the file/module where the current task queue and agent routing are handled so I can start looking into it? Thanks!

[zakiscoding]

Submitted a PR implementing capability-based routing with Task, Agent classes and updated TaskRouter.claim_task() to match by capability.