This PR supports the creation of 2.y (and 3.y in the future).
Copy jaiabot-debian as jaiabot/debian (we should archive jaiabot-debian after merging this PR).
Copy jaiabot-rootfs-gen as jaiabot/rootfs (we should archive jaiabot-rootfs-gen after merging this PR).
Merge CircleCI config into jaiabot/.circleci/config.yml. Set filter template for rootfs builds to default to 1.y only (not every commit as these take a while to build). Can be set temporarily in a feature branch to do rootfs builds on that branch just as we can set test Debian package builds now.
Rename test/X.y to test/1.y everywhere (with the expectation of the new 2.y will use test/2.y).
Update packages.jaia.tech to have 2.y repos and configuration.
Update docs at src/doc/markdown/page19_repository.md
Add scripts/release_branch file that all scripts now use to determine the current release branch (1.y, 2.y, etc.) rather than defaulting to 1.y.
This PR supports the creation of 2.y (and 3.y in the future).