[component] Coinbase

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

**References**

- Website: https://www.coinbase.com/
- Documentation: https://docs.cdp.coinbase.com/

**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

No files, tests, or entry points are named. Start by reading the Coinbase documentation at the referenced URL and reviewing the repository's existing connector structure. Done means implementing the specified actions and triggers, adding unit or integration tests, documenting connection setup, adding a Guidejar tutorial, and making the generated documentation available.

Written by the indexing model from the issue text.