project_panel: Add auto_open settings (#40435)

- Based on #40234, and improvement of #40331

Release Notes:

- Added granular settings to control when files auto-open in the project
panel (project_panel.auto_open.on_create, on_paste, on_drop)

<img width="662" height="367" alt="Screenshot_2025-10-16_17-28-31"
src="https://github.com/user-attachments/assets/930a0a50-fc89-4c5d-8d05-b1fa2279de8b"
/>

---------

Co-authored-by: Smit Barmase <heysmitbarmase@gmail.com>

crates/settings/src/settings_content/workspace.rs

@@ -510,6 +510,23 @@ impl OnLastWindowClosed {
     }
 }
 
+#[skip_serializing_none]
+#[derive(Clone, PartialEq, Default, Serialize, Deserialize, JsonSchema, MergeFrom, Debug)]
+pub struct ProjectPanelAutoOpenSettings {
+    /// Whether to automatically open newly created files in the editor.
+    ///
+    /// Default: true
+    pub on_create: Option<bool>,
+    /// Whether to automatically open files after pasting or duplicating them.
+    ///
+    /// Default: true
+    pub on_paste: Option<bool>,
+    /// Whether to automatically open files dropped from external sources.
+    ///
+    /// Default: true
+    pub on_drop: Option<bool>,
+}
+
 #[skip_serializing_none]
 #[derive(Clone, PartialEq, Default, Serialize, Deserialize, JsonSchema, MergeFrom, Debug)]
 pub struct ProjectPanelSettingsContent {
@@ -590,10 +607,8 @@ pub struct ProjectPanelSettingsContent {
     ///
     /// Default: true
     pub drag_and_drop: Option<bool>,
-    /// Whether to automatically open files when pasting them in the project panel.
-    ///
-    /// Default: true
-    pub open_file_on_paste: Option<bool>,
+    /// Settings for automatically opening files.
+    pub auto_open: Option<ProjectPanelAutoOpenSettings>,
 }
 
 #[derive(

crates/settings/src/vscode_import.rs

@@ -664,13 +664,13 @@ impl VsCodeSettings {
             hide_root: None,
             indent_guides: None,
             indent_size: None,
-            open_file_on_paste: None,
             scrollbar: None,
             show_diagnostics: self
                 .read_bool("problems.decorations.enabled")
                 .and_then(|b| if b { Some(ShowDiagnostics::Off) } else { None }),
             starts_open: None,
             sticky_scroll: None,
+            auto_open: None,
         };
 
         if let (Some(false), Some(false)) = (