Add Code Actions to the Toolbar (#31236)

Closes issue #31120.


https://github.com/user-attachments/assets/a4b3c86d-7358-49ac-b8d9-e9af50daf671

Release Notes:

- Added a code actions icon to the toolbar. This icon can be disabled by
setting `toolbar.code_actions` to `false`.

crates/editor/src/actions.rs

@@ -74,16 +74,22 @@ pub struct SelectToEndOfLine {
 #[derive(PartialEq, Clone, Deserialize, Default, JsonSchema)]
 #[serde(deny_unknown_fields)]
 pub struct ToggleCodeActions {
-    // Display row from which the action was deployed.
+    // Source from which the action was deployed.
     #[serde(default)]
     #[serde(skip)]
-    pub deployed_from_indicator: Option<DisplayRow>,
+    pub deployed_from: Option<CodeActionSource>,
     // Run first available task if there is only one.
     #[serde(default)]
     #[serde(skip)]
     pub quick_launch: bool,
 }
 
+#[derive(PartialEq, Clone, Debug)]
+pub enum CodeActionSource {
+    Indicator(DisplayRow),
+    QuickActionBar,
+}
+
 #[derive(PartialEq, Clone, Deserialize, Default, JsonSchema)]
 #[serde(deny_unknown_fields)]
 pub struct ConfirmCompletion {