feat(commands): command palette

[matoous]

Add new command to display command pallete that can be used
to discover and execute available commands.

Fixes: #559

[matoous]

Current state ⬆️

I would like to align the key bindings to the right side but that would require larger changes.

[archseer]

I would like to align the key bindings to the right side but that would require larger changes.

I agree that this can be done later on, but take a look at how the completion Menu component uses the Item trait/Table tui component:

helix/helix-term/src/ui/menu.rs

Lines 16 to 22 in 0dab6c8

	pub trait Item {
	fn sort_text(&self) -> &str;
	fn filter_text(&self) -> &str;
	fn label(&self) -> &str;
	fn row(&self) -> Row;
	}

Most components would then have to use some default implementation that only exposes a single row.

[archseer]

(There's an old TODO here to actually implement the picker list via Menu too but it's possible the components have diverged too much now

helix/helix-term/src/ui/menu.rs

Lines 44 to 45 in 0dab6c8

	// TODO: it's like a slimmed down picker, share code? (picker = menu + prompt with different
	// rendering)

)

[heliostatic]

I'd love to have this functionality -- what's the current state?

[matoous]

@heliostatic I went down the rabbit hole of

There's an old TODO here to actually implement the picker list via Menu too but it's possible the components have diverged too much now

But didn't have time to finish it yet.

[archseer]

I'll merge this as is and we can work on the improvement in a follow-up. Can you fix the conflicts?

[matoous]

@archseer done, sorry for taking so long with this PR, I sadly don't have much time lately.

[matoous]

@archseer suggestions applied and issues fixed.

[archseer]

Sorry, one more rebase! I merged the debugger branch so there's some conflicts.

[matoous]

@archseer done ✅

[archseer]

Thanks for the patience! 🎉