chore: disable group field that does not support grouping

Author: appflowy

frontend/app_flowy/lib/plugins/grid/application/field/field_controller.dart

@@ -290,5 +290,26 @@ class GridFieldContext {
 
   bool get isGroupField => _isGroupField;
 
+  bool get canGroup {
+    switch (_field.fieldType) {
+      case FieldType.Checkbox:
+        return true;
+      case FieldType.DateTime:
+        return false;
+      case FieldType.MultiSelect:
+        return true;
+      case FieldType.Number:
+        return false;
+      case FieldType.RichText:
+        return false;
+      case FieldType.SingleSelect:
+        return true;
+      case FieldType.URL:
+        return false;
+    }
+
+    return false;
+  }
+
   GridFieldContext({required FieldPB field}) : _field = field;
 }

frontend/app_flowy/lib/plugins/grid/presentation/widgets/toolbar/grid_group.dart

@@ -31,10 +31,15 @@ class GridGroupList extends StatelessWidget {
       child: BlocBuilder<GridGroupBloc, GridGroupState>(
         builder: (context, state) {
           final cells = state.fieldContexts.map((fieldContext) {
-            return _GridGroupCell(
+            Widget cell = _GridGroupCell(
               fieldContext: fieldContext,
               key: ValueKey(fieldContext.id),
             );
+
+            if (!fieldContext.canGroup) {
+              cell = IgnorePointer(child: Opacity(opacity: 0.3, child: cell));
+            }
+            return cell;
           }).toList();
 
           return ListView.separated(

frontend/app_flowy/pubspec.lock

@@ -35,7 +35,7 @@ packages:
       path: "packages/appflowy_editor"
       relative: true
     source: path
-    version: "0.0.3"
+    version: "0.0.4"
   args:
     dependency: transitive
     description: