chore: Remove outline dependency from breadcrumbs (#22504)

This slashes our incremental dev times (touch editor) by 0.6s
(8.1->7.6s) due to unblocking terminal_view build sooner.

Closes #ISSUE

Release Notes:

- N/A

crates/breadcrumbs/Cargo.toml

@@ -16,10 +16,10 @@ doctest = false
 editor.workspace = true
 gpui.workspace = true
 itertools.workspace = true
-outline.workspace = true
 theme.workspace = true
 ui.workspace = true
 workspace.workspace = true
+zed_actions.workspace = true
 
 [dev-dependencies]
 editor = { workspace = true, features = ["test-support"] }