Newrelic-sb-sdk

* Update links to GitLab repository.
* Update tbump config.
* Update contributing guide.

* Update NewRelicGqlClient to support GraphQL variables in request body.
* Update NewRelicGqlClient to use `build_query` from `utils.query`.
* Update typing in build_query from utils.query.
* Add tests for `utils.test`.
* Export query and response notebooks to utils submodule.
* Add Alerts submodule.

* Complete development with nbdev.
* Complete documentation in Jupyterbook.
* Add Dashboards module.
* Add GraphQL module.