Add action QueryPaneNames to list pane names

[thled]

This adds an action to Zellij called query-pane-names. It is inspired by query-tab-names (see #2145).

It shows a list of all panes in the current tab.

[serranomorante]

Looking forward to this feature!! 😄

[VasilisManol]

This would be a useful feature!

[last-genius]

This issue (along with a version of go-to-tab-name for panes) would help out a lot for Zellij's support from third-party tools. Currently an integration with a debugger plugin I'm writing is stuck because of the inability to close a pane with a particular name (since Zellij, to my knowledge, is lacking any other unique identifiers for panes and tabs, and directions, or "previous pane" isn't enough of a guarantee ). tmux has both unique IDs and an ability to kill panes (among other things) by ID, without switch->close routine present in Zellij, for example.

#3314 has helped this somewhat (though it doesn't list non-focused panes), but I'm missing how pane IDs could be utilized in the rest of the CLI actions. Is this possibly planned?

I'm wondering why this PR hasn't been taken up? Is the project lacking hands for review? Could I help?