[component] Exa

As a Workflow Developer,
I want to be able to use the native **Exa** connector,
So that I can implement more complex integration use cases involving **Exa**.

**References**

- Website: Website: https://exa.ai/
- Documentation: https://docs.exa.ai/reference/getting-started

**Acceptance Criteria**

Implemented actions:
TODO

Implemented triggers
TODO

**Definition of Done**

- [ ] Unit/Integration tests
- [ ] Connection setup steps
- [ ] Guidejar tutorial for connection setup
- [ ] Documentation is generated and available

Start with Exa's getting-started documentation at https://docs.exa.ai/reference/getting-started and determine which actions and triggers this connector should support. Done means the connector has unit/integration tests, documented connection setup, a Guidejar setup tutorial, and generated documentation available.

Written by the indexing model from the issue text.