title_bar: Remove dependency on feedback (#21013)

This PR removes the `title_bar` crate's dependency on the `feedback`
crate.

The `feedback::GiveFeedback` action now resides at
`zed_actions::feedback::GiveFeedback`.

`title_bar` now no longer depends on `editor` 🥳 

Release Notes:

- N/A

crates/zed_actions/src/lib.rs

@@ -56,6 +56,12 @@ pub mod command_palette {
     actions!(command_palette, [Toggle]);
 }
 
+pub mod feedback {
+    use gpui::actions;
+
+    actions!(feedback, [GiveFeedback]);
+}
+
 pub mod theme_selector {
     use gpui::impl_actions;
     use serde::Deserialize;