aya/.github
Dave Tucker f08680eb83 Add project governance documentation
Explains how Maintainers are selected and their responsibilities.
Explains the Pull Request review workflow.
Adds config for Mergify to enforce this workflow.

Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
..
scripts Allow `+bpo` kernels
workflows codegen: tidy up
PULL_REQUEST_TEMPLATE.md Add project governance documentation
dependabot.yml Reduce dependabot toil