Enable Format Flags for List

[kyzrfranz]

Since automation is one of the things I'm currently working on, I realised that the list commands don't make use of the formatting. I realise that's due to the fact that the output combines two sets of data essentially, that's not quite straightforward to put into one set.

So the suggestion would be to:

• enable the format flags on list
• introduce a new flag -a| --available that shows only locally available, unconfigured disks
• make listing microceph configured devices the default behavior

hope this is feasible.

[wolsen]

Thanks for the PR @kyzrfranz! This PR feels like it should be multiple commits as there's at least 2 distinct changes in here (list available disks, add format flags).

In addition it'd be great to see some test coverage for new functionality.

[wolsen]

The order of the imports should be revisited. The convention for the repository is:

built-in

external imports

internal imports (github.com/canonical/microceph/XYZ in this case)

[kyzrfranz]

Hey, I've been looking into adding tests and it feels like this will cause some refactoring.

The calls microcluster.App() would have to be put inside a PreRunE from my perspective as starters.
Also this should be mockable, so there will be need for a construct that allows for it later on - for now we could leave as is.
I would also recommend of using the localClient to instantiate an ApiClient from the clientpackage.
Then we can just use that to read disks/resources/etc in the commands and mock it nicely.

type cmdDiskList struct {
	common       *CmdControl
	disk         *cmdDisk
	restClient ApiClient
}

So - I could make a suggestion, but it would affect a lot of code.

There may also be a quick & hacky way, but I'm not particularly keen on going there..