Buildkite Pipelines for Matrix.org Projects.

See the intructions at https://gitlab.matrix.org/new-vector/internal/-/wikis/BuildKite#testing-a-pipeline-locally.

The above is an internal page. If you are not allowed to view this page, know that the instructions effectively boil down to:

1. Install buildkite-agent and buildkite-cli.
2. Change to the codebase directory of the project you'd like to test.
3. Run bk local run /path/to/project/pipeline.yml.

Note that --debug can be added to the above command to produce some more helpful logs.