0.3.0 Release

Written for ppa-dev-tools by Bryce Harrington on 2022-10-28

Autopkgtest trigger action URLs are printed for packages in the PPA when
running the `ppa tests` command. Both plain and 'all-proposed' style
triggers are displayed. These can be loaded in a web browser by someone
with core-dev permissions to start the test runs. `ppa tests` can then
be re-run to check on the tests status and results.

Most commands now accept the PPA identifier as a URL, as well as a
formal PPA address, or just the basic name of the PPA, which will be
assumed to be in the user's namespace.

New options are now available for a few commands. The option parsing
and handling has been significantly reworked to allow per-command arg
shortcuts, so for instance -r can mean one thing for the 'create'
command and something completely different for the 'wait' command.