feat(Notepad): Complete refactor - New popout mode & settings

- Add a full popout Notepad experience w/new layout settings
- New ability to choose the left or right side of the screen
- Add more safegaurds to preserve user data throughout
- New banner to show file reload/conflict handling
- New extensionless file support
- Polish settings with gap controls, compact buttons, and shortcuts help

quickshell/DMSShell.qml

@@ -1093,11 +1093,17 @@ Item {
             slideoutWidth: 480
             expandable: true
             expandedWidthValue: 960
+            edgeGap: SettingsData.notepadEffectiveEdgeGap
+            slideEdge: SettingsData.notepadSlideoutSide
 
             content: Component {
                 Notepad {
                     slideout: notepadSlideout
                     onHideRequested: notepadSlideout.hide()
+                    onPopoutRequested: {
+                        notepadSlideout.hide();
+                        PopoutService.openNotepadPopout();
+                    }
                 }
             }
 
@@ -1114,6 +1120,24 @@ Item {
         Component.onCompleted: PopoutService.notepadSlideouts = instances
     }
 
+    LazyLoader {
+        id: notepadPopoutLoader
+        active: false
+
+        Component.onCompleted: {
+            PopoutService.notepadPopoutLoader = notepadPopoutLoader;
+        }
+
+        onActiveChanged: {
+            if (active && item) {
+                PopoutService.notepadPopout = item;
+                PopoutService._onNotepadPopoutLoaded();
+            }
+        }
+
+        NotepadPopoutWindow {}
+    }
+
     LazyLoader {
         id: powerMenuModalLoader