Migrate to GitHub Actions

[danielballan]

Due to changes in the Travis CI billing, the Bluesky org is migrating CI to GitHub Actions.

Repo	Current CI	Issue	Migration PR(s)	New CI	Further action required
bluesky/databroker					No
bluesky/bluesky					No
bluesky/ophyd					No
bluesky/event-model					No
bluesky/area-detector-handlers					Yes
bluesky/bluesky-darkframes					Yes
bluesky/bluesky-adaptive					Yes
bluesky/bluesky-live					Yes
bluesky/bluesky-widgets					Yes
bluesky/databroker-pack					Yes
bluesky/bluesky-queueserver			https://github.com/bluesky/bluesky-queueserver/pull/101		Yes
bluesky/hkl-notebooks					Yes
bluesky/hklpy					No
bluesky/databroker-server					Yes
bluesky/bluesky-slides					Yes
bluesky/bluesky-kafka					Yes
bluesky/bluesky-cartpole					Yes
bluesky/suitcase-cookiecutter					Yes
bluesky/suitcase-mongo					Yes
bluesky/suitcase-tiff					Yes
bluesky/suitcase-specfile					Yes
bluesky/suitcase-msgpack					Yes
bluesky/suitcase-json-metadata					Yes
bluesky/suitcase-jsonl					Yes
bluesky/suitcase-csv					Yes
bluesky/suitcase-utils					Yes
bluesky/suitcase-nxsas					Yes
bluesky/suitcase-dataexchange					Yes
bluesky/suitcase-nxstxm					Yes
bluesky/tutorials					Yes

[prjemian]

hklpy CI complete on GitHub Actions