Add support for new Alpine's pipelines

Fixes #30 (closed)

It contains a considerable amount of refactoring, so some testing would be helpful. There might be more work to do, like moving parse_git_origin to origin. But I don't want to get carried away even more

mrhlpr/pipeline.py

@@ -36,7 +36,9 @@ class PipelineMetadata:
             )
             if trigger_jobs:
                 if len(trigger_jobs) != 1:
-                    raise RuntimeError(f"Unexpected number of jobs: got {trigger_jobs} instead of 1")
+                    raise RuntimeError(
+                        f"Unexpected number of jobs: got {trigger_jobs} instead of 1"
+                    )
                 pipeline_id = trigger_jobs[0]["downstream_pipeline"]["id"]
                 pipeline_project_id = trigger_jobs[0]["downstream_pipeline"]["project_id"]