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/migrator/src/migrator.rs

@@ -215,6 +215,10 @@ pub fn migrate_settings(text: &str) -> Result<Option<String>> {
         MigrationType::Json(migrations::m_2025_10_16::restore_code_actions_on_format),
         MigrationType::Json(migrations::m_2025_10_17::make_file_finder_include_ignored_an_enum),
         MigrationType::Json(migrations::m_2025_10_21::make_relative_line_numbers_an_enum),
+        MigrationType::TreeSitter(
+            migrations::m_2025_11_12::SETTINGS_PATTERNS,
+            &SETTINGS_QUERY_2025_11_12,
+        ),
     ];
     run_migrations(text, migrations)
 }
@@ -333,6 +337,10 @@ define_query!(
     SETTINGS_QUERY_2025_10_03,
     migrations::m_2025_10_03::SETTINGS_PATTERNS
 );
+define_query!(
+    SETTINGS_QUERY_2025_11_12,
+    migrations::m_2025_11_12::SETTINGS_PATTERNS
+);
 
 // custom query
 static EDIT_PREDICTION_SETTINGS_MIGRATION_QUERY: LazyLock<Query> = LazyLock::new(|| {
@@ -2193,4 +2201,49 @@ mod tests {
             ),
         );
     }
+
+    #[test]
+    fn test_project_panel_open_file_on_paste_migration() {
+        assert_migrate_settings(
+            &r#"
+            {
+                "project_panel": {
+                    "open_file_on_paste": true
+                }
+            }
+            "#
+            .unindent(),
+            Some(
+                &r#"
+                {
+                    "project_panel": {
+                        "auto_open": { "on_paste": true }
+                    }
+                }
+                "#
+                .unindent(),
+            ),
+        );
+
+        assert_migrate_settings(
+            &r#"
+            {
+                "project_panel": {
+                    "open_file_on_paste": false
+                }
+            }
+            "#
+            .unindent(),
+            Some(
+                &r#"
+                {
+                    "project_panel": {
+                        "auto_open": { "on_paste": false }
+                    }
+                }
+                "#
+                .unindent(),
+            ),
+        );
+    }
 }