Fixes and improvements to pane context menu

[Poldraunic]

Small bunch of QoL changes that I've noticed today.

For the out-of-project files action "Copy Relative Path" was available, but copied empty string. Check for this action was in place, but the relative path was empty string and not None. For the same out-of-project file action "Reveal in Project Panel" was available and did nothing.

And new action "Reveal in File Manager" that allows to open this file in the file manager. This is especially useful for the same out-of-project file.

Release Notes:

• N/A or Added/Fixed/Improved ...

[Poldraunic]

I followed it down to this

zed/crates/project/src/worktree_store.rs

Lines 148 to 159 in 74223c1

	pub fn find_worktree(
	&self,
	abs_path: &Path,
	cx: &AppContext,
	) -> Option<(Model<Worktree>, PathBuf)> {
	for tree in self.worktrees() {
	if let Ok(relative_path) = abs_path.strip_prefix(tree.read(cx).abs_path()) {
	return Some((tree.clone(), relative_path.into()));
	}
	}
	None
	}

I am not familiar how Worktrees work yet, but it seems that even for a single out-of-project file Worktree is created with the same Path. Meaning this Path::strip_prefix() will nuke whole path and we'll be left with empty string.

I considered checking paths here for equality and returning None if they're equal. This code is pretty low level and I don't know if this would be correct thing to do.

[Poldraunic]

This is also sus. when_some() call requires moving value, but the same value is used to check in two different places. I don't know what would be an idiomatic way. Calling clone() would be fine, I guess? But for this check I don't need a value at all.

[Poldraunic]

Any chance someone takes a look at this? :^)

[mikayla-maki]

Hi @Poldraunic

Could you add some succinct release notes to your PR? Not quite sure what this PR is intended to address :)

[maxdeviant]

@Poldraunic Could we split these changes up into separate PRs that are independently reviewable/mergeable?