Add more tools to the drawing toolbar

lib/features/sheet_viewer/drawing/paint_preset.dart

@@ -57,7 +57,7 @@ class PaintPreset {
   static const yellowMarker = PaintPreset(
     name: 'Yellow Marker',
     color: Color(0x80FFEB3B), // Yellow with 50% opacity
-    strokeWidth: 0.015, // Thicker for highlighting
+    strokeWidth: 0.02, // Thicker for highlighting
     icon: Icons.highlight,
   );
 
@@ -65,7 +65,7 @@ class PaintPreset {
   static const greenMarker = PaintPreset(
     name: 'Green Marker',
     color: Color(0x804CAF50), // Green with 50% opacity
-    strokeWidth: 0.015,
+    strokeWidth: 0.018,
     icon: Icons.highlight,
   );
 
@@ -91,7 +91,10 @@ class PaintPreset {
   static const List<PaintPreset> quickAccess = [
     blackPen,
     redPen,
+    bluePen,
     yellowMarker,
+    greenMarker,
+    pinkMarker,
   ];
 
   @override