Add support to external repositories, bash completion and other quality of life improvements

[natanjunges]

Implemented features:

• External package repositories (implements Support external repositories and move supported packages to one #313)
• Bash completion (implements Shell completion #465)
• Deprecated packages handling, warning about them when installed (mentioned at geforcenow-electron dropped support for deb packages #295)
• Optimized and filtered versions of the list command (--raw, --installed and --not-installed)
• Filter outputs of prettylist and csvlist by package repository (reverts and fixes Add reminder to move custom user includes aside #458)
• Simpler version of the update command (--repos-only) that only initializes and updates deb-get's external package repositories, without updating apt or looking for updates of installed packages
• Install/upgrade hooks to initialize/update package repositories
• Purge hook to remove cache and package repositories
• Documentation of new features and preparation of existing pertinent documentation to be moved to main package repository
• Split test workflows that apply to deb-get and to 01-main subfolder

[lucyllewy]

I'm gonna say LGTM.

[philclifford]

I still believe d08c943 breaks us (because 2 APT lists pointing to same repo with two (albeit identical) keys makes apt upset ) - testing in clean VM confirms.

Otherwise LGTM too - bravo!

I'll try and let all the install tests run through somewhere (also on debian) but it is noteworthy that

• several apps will now fail on kinetic because repos/ppas have not built for kinetic (yet)
  • currently that causes the list and key to be removed - maybe not ideal if there was a happy jammy repo

[natanjunges]

I still believe d08c943 breaks us

Yes indeed, but I thought it was better to address that in a separate PR once this one is merged (I'm thinking on a solution with hard links, since they have built-in reference counting, but there might be better ones). Then we can work on the ideas we discussed for apt-like depends, conflicts and replaces as well.

* the "deb-get Tests" passes even though dpkg fails if you look at the log shrug

Where? I only found an ls error, but it is harmless (ideally it should be silenced).

* several apps will now fail on kinetic because repos/ppas have not built for kinetic (yet)

This does not concern this PR, but we will indeed need to address it, ideally before the next release of deb-get.

  * currently that causes the list and key to be removed - maybe not ideal if there was a happy jammy repo

We should also try to come up with a better solution in a separate PR, something in the lines of #603.

[philclifford]

Yes indeed, but I thought it was better to address that in a separate PR once this one is merged

Fine with that : we should perhaps add a note somewhere that 6.1 users must uninstall 6.1 before installing 7.0

[philclifford]

Where? I only found an ls error, but it is harmless (ideally it should be silenced).

Sorry - mea culpa. Looks like I was confused (how unusual!) - Only seeing the ls now: I did see a dpkg fail in a test that passed, but was thrashing around in the early hours and mis-remembered after sleeping.

[philclifford]

https://github.com/philclifford/deb-get/actions/runs/3331912181

LGTM

[OhMyMndy]

Really cool to see some big progress on deb-get! One thing, which isn't possible any more, is to just grab the deb-get file from the repo and execute it because it depends on many other files. Reason why I used deb-get like that is to use the version from my pull request because it wasn't merged yet (I wanted to install something with deb-get which was not upstream yet).

This setup resolves that problem by allowing external repo's!

Great work @natanjunges @philclifford @diddledani