Publish a testing guide with CICD pipelines

[sabbyanandan]

Context:

would be great to have a testing guide to know how one can use chainhook with CI/CD testing

[sabbyanandan]

@pradel: When you get a chance, please share more about what you need guidance on.

Some scenarios that come to mind:

1: Fixing a bug or contract functionality and then ensuring the Chainhooks are functioning correctly.
2: Automatically create or update Chainhook predicate based on external triggers such as the git commit or CICD runs.

There can be others, too, so feel free to add context.