[FEAT] Add base agent to docs

[ondrej-lukas]

Is your feature request related to a problem? Please describe.

Documentation does not show the base agent class. Currently, the users not developing the server have no api reference

Suggested solution

Mimic the code structure in the docs

• game components
• agents
  • base agent
• game
  • agent server
  • config manager
  • config parser
  • game coordinator
  • worlds
    • nsg

Alternatives considered

No response

Additional context

No response