Meta agent dev hayley

[HayleyO]

Functionality:

• Creates a meta-agent to run onboard each agent (currently not attached to the OnAir reasoning components)
• Allows each agent to keep track of other agents in the "fleet", and broadcasts updates of new topics or new subscribers to all agents in the known fleet so each agent can monitor who is subscribed to what
• Allows for publishing to the topic and then sends that topic information to each subscribed agent, allows for a callback function which can be implemented on the agent's side for how they choose to handle and interact with the data being sent from a topic

Still needs:

• Thorough testing, including with pybullet simulated drones (can I send information or instructions to a separate drone?)
• Testing across a network, currently both agents are on a localhost with different IPs
• A smart way to combine IP and ports, or a way of reading in a config file to know the current fleet and their associated IPs and ports (which should all be unique
• A way of checking that all port and IP combos are in fact unique
• More work on the topic dictionary so it looks a little cleaner?