Need a clean interface to define Triggers, events that auto-run the Assistant

[andreibondarev]

Description

Currently the Assistant can only be run manually by calling .run on it. We should define a way to trigger it automatically via "triggers". The Assistant can observe a schedule (cron) or state changes.

What should the DSL look like for this?

[sergiobayona]

For cron jobs, it could be something similar to the whenever gem, like:

llm = Langchain::LLM::OpenAI.new(api_key: ENV["OPENAI_API_KEY"])
assistant = Langchain::Assistant.new(
  llm: llm,
  instructions: "You're a helpful AI assistant",
  tools: [Langchain::Tool::NewsRetriever.new(api_key: ENV["NEWS_API_KEY"])]
)

schedule = Langchain::Scheduler.new

schedule.every :day, at: '12pm' do
  assistant.add_message_and_run content: "What's new in Artificial Intelligence?", auto_tool_execution: true
  puts assistant.messages.last.content
end