Openapi agent (superagent-ai#68)

* Add an `OpenAPI` Agent

* Remove `print` statement

* Add support for an Agent that can query API with NL

* Add support for adding a prompt when creating an Agent

* Small tweaks

Update

Add possiblity to attach custom prompts to an agent (superagent-ai#62)

* Add possiblity to attach custom prompts to an agent

* Remove print statement

Attach a prompt to an Agent (superagent-ai#58)

Add streaming support to `Anthropic`

Add streaming support for `Anthropic`

Fix `Digitalocean` deployment config (superagent-ai#44)

Small tweak

Add functionality for running a `ConversationalRetrievalChain` (super…

…agent-ai#28)

Update README