added more utilty packges

Packages/com.jovian.inspector/Editor/Attributes/BitmaskAttribute.cs

@@ -0,0 +1,47 @@
+using UnityEditor;
+using UnityEngine;
+
+namespace InspectorToolkit
+{
+	public class BitmaskAttribute : PropertyAttribute {
+        public string[] groupNames;
+        public BitmaskAttribute(params string[] groupNames) {
+            this.groupNames = groupNames;
+        }
+    }
+}
+
+#if UNITY_EDITOR
+namespace InspectorToolkit.Internal
+{
+
+    [CustomPropertyDrawer(typeof(BitmaskAttribute))]
+	public class BitmaskAttributeDrawer : PropertyDrawer {
+        
+		public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
+		{
+            if(property.propertyType != SerializedPropertyType.Integer) {
+                GUI.Label(position, "Error, SerializedProperty must be 'Integer' type");
+                return;
+            }
+
+            if(attribute is not BitmaskAttribute bitmaskAttribute) {
+                return;
+            }
+            
+            string[] groups = bitmaskAttribute.groupNames;
+            if(groups.Length == 0 || groups.Length > 8) {
+                GUI.Label(position, "Error, bitmask group count not valid");
+                return;
+            }
+
+            EditorGUI.BeginProperty(position, label, property);
+            property.intValue = EditorGUI.MaskField(position, label, property.intValue, groups);
+            int indent = EditorGUI.indentLevel;
+            EditorGUI.indentLevel = 0;
+            EditorGUI.indentLevel = indent;
+            EditorGUI.EndProperty();
+        }
+	}
+}
+#endif