Bots - TODOs

[Frando]

After #66 is merged there are a few remaining TODOs for bots:

• Documentation
  Both high-level and code docs
• Persist bot config and joined collections
• Merge session handling with core
• Decide structure of args for bots (JSON object vs string array vs JSON array)
• Allow to start and stop bots from within Sonar ("bot runner")
• Think through practical workflows with bots around authentication and management