Add automated package build

[Eeems]

1. The workflow installs libarchive-tools as the current package command requires bsdtar
2. The workflow downloads just the package file for the current commit and updates the package version, and source URL
   • Package version will be generated with the following: 5.4.70~r{sha}.{run_number}-{run_attempt}
     • sha is the git sha for the commit
     • run_number is the count of runs of the workflow, starting at 1
     • run_attempt is the count of attempts a specific workflow run has had, which is useful if you have to reattempt a build due to a bad external dependency or something
3. Package is built using toltecmk
4. Packages are uploaded as an artifact