General: Generic support for container solutions

[yveszoundi]

Background

As of now, there are 3 officially supported container solutions:

• Docker (Linux, Mac OS, Windows)
• Podman (Linux, possibly WSL???): This doesn't include podman-remote
• Lima (Mac OS): This is limited to the default instance for now

There's also hidden direct support for [nerdctl](https://github.com/containerd/nerdctl

• It's not advertised as it was never properly tested.
• The goal was to support Rancher Desktop but then it became obvious that few settings would need to be exposed to users (default mounted volumes vs. user customization for tinkerers, etc.).

Request

It is desirable to easily supporting additional container solutions such as Rancher Desktop and possibly much more. This request might not be worth the trouble:

• Supporting too many options creates lots of testing efforts
• Generic support will possibly complicate the code while making few parts more fragile or "user-error" prone

Overall changes

• New user settings for generic container solution command-line invocation?
  • Settings tab in the Desktop client
  • Configuration file changes
• Runtime preparation changes prior starting document processing