refactor: add Grid prefix to some Grid cells

frontend/app_flowy/lib/workspace/presentation/plugins/grid/src/widgets/cell/cell_builder.dart

@@ -30,15 +30,15 @@ class GridCellBuilder {
     final key = cell.key();
     switch (cell.fieldType) {
       case FieldType.Checkbox:
-        return CheckboxCell(cellControllerBuilder: cellControllerBuilder, key: key);
+        return GridCheckboxCell(cellControllerBuilder: cellControllerBuilder, key: key);
       case FieldType.DateTime:
-        return DateCell(cellControllerBuilder: cellControllerBuilder, key: key, style: style);
+        return GridDateCell(cellControllerBuilder: cellControllerBuilder, key: key, style: style);
       case FieldType.SingleSelect:
-        return SingleSelectCell(cellContorllerBuilder: cellControllerBuilder, style: style, key: key);
+        return GridSingleSelectCell(cellContorllerBuilder: cellControllerBuilder, style: style, key: key);
       case FieldType.MultiSelect:
-        return MultiSelectCell(cellContorllerBuilder: cellControllerBuilder, style: style, key: key);
+        return GridMultiSelectCell(cellContorllerBuilder: cellControllerBuilder, style: style, key: key);
       case FieldType.Number:
-        return NumberCell(cellContorllerBuilder: cellControllerBuilder, key: key);
+        return GridNumberCell(cellContorllerBuilder: cellControllerBuilder, key: key);
       case FieldType.RichText:
         return GridTextCell(cellContorllerBuilder: cellControllerBuilder, style: style, key: key);
       case FieldType.URL:

frontend/app_flowy/lib/workspace/presentation/plugins/grid/src/widgets/cell/checkbox_cell.dart

@@ -6,18 +6,18 @@ import 'package:flutter/widgets.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'cell_builder.dart';
 
-class CheckboxCell extends GridCellWidget {
+class GridCheckboxCell extends GridCellWidget {
   final GridCellControllerBuilder cellControllerBuilder;
-  CheckboxCell({
+  GridCheckboxCell({
     required this.cellControllerBuilder,
     Key? key,
   }) : super(key: key);
 
   @override
-  GridCellState<CheckboxCell> createState() => _CheckboxCellState();
+  GridCellState<GridCheckboxCell> createState() => _CheckboxCellState();
 }
 
-class _CheckboxCellState extends GridCellState<CheckboxCell> {
+class _CheckboxCellState extends GridCellState<GridCheckboxCell> {
   late CheckboxCellBloc _cellBloc;
 
   @override

frontend/app_flowy/lib/workspace/presentation/plugins/grid/src/widgets/cell/date_cell/date_cell.dart

@@ -18,11 +18,11 @@ abstract class GridCellDelegate {
   GridCellDelegate get delegate;
 }
 
-class DateCell extends GridCellWidget {
+class GridDateCell extends GridCellWidget {
   final GridCellControllerBuilder cellControllerBuilder;
   late final DateCellStyle? cellStyle;
 
-  DateCell({
+  GridDateCell({
     GridCellStyle? style,
     required this.cellControllerBuilder,
     Key? key,
@@ -35,10 +35,10 @@ class DateCell extends GridCellWidget {
   }
 
   @override
-  GridCellState<DateCell> createState() => _DateCellState();
+  GridCellState<GridDateCell> createState() => _DateCellState();
 }
 
-class _DateCellState extends GridCellState<DateCell> {
+class _DateCellState extends GridCellState<GridDateCell> {
   late DateCellBloc _cellBloc;
 
   @override

frontend/app_flowy/lib/workspace/presentation/plugins/grid/src/widgets/cell/number_cell.dart

@@ -6,19 +6,19 @@ import 'package:flutter_bloc/flutter_bloc.dart';
 
 import 'cell_builder.dart';
 
-class NumberCell extends GridCellWidget {
+class GridNumberCell extends GridCellWidget {
   final GridCellControllerBuilder cellContorllerBuilder;
 
-  NumberCell({
+  GridNumberCell({
     required this.cellContorllerBuilder,
     Key? key,
   }) : super(key: key);
 
   @override
-  GridFocusNodeCellState<NumberCell> createState() => _NumberCellState();
+  GridFocusNodeCellState<GridNumberCell> createState() => _NumberCellState();
 }
 
-class _NumberCellState extends GridFocusNodeCellState<NumberCell> {
+class _NumberCellState extends GridFocusNodeCellState<GridNumberCell> {
   late NumberCellBloc _cellBloc;
   late TextEditingController _controller;
   Timer? _delayOperation;

frontend/app_flowy/lib/workspace/presentation/plugins/grid/src/widgets/cell/select_option_cell/select_option_cell.dart

@@ -20,11 +20,11 @@ class SelectOptionCellStyle extends GridCellStyle {
   });
 }
 
-class SingleSelectCell extends GridCellWidget {
+class GridSingleSelectCell extends GridCellWidget {
   final GridCellControllerBuilder cellContorllerBuilder;
   late final SelectOptionCellStyle? cellStyle;
 
-  SingleSelectCell({
+  GridSingleSelectCell({
     required this.cellContorllerBuilder,
     GridCellStyle? style,
     Key? key,
@@ -37,10 +37,10 @@ class SingleSelectCell extends GridCellWidget {
   }
 
   @override
-  State<SingleSelectCell> createState() => _SingleSelectCellState();
+  State<GridSingleSelectCell> createState() => _SingleSelectCellState();
 }
 
-class _SingleSelectCellState extends State<SingleSelectCell> {
+class _SingleSelectCellState extends State<GridSingleSelectCell> {
   late SelectOptionCellBloc _cellBloc;
 
   @override
@@ -74,11 +74,11 @@ class _SingleSelectCellState extends State<SingleSelectCell> {
 }
 
 //----------------------------------------------------------------
-class MultiSelectCell extends GridCellWidget {
+class GridMultiSelectCell extends GridCellWidget {
   final GridCellControllerBuilder cellContorllerBuilder;
   late final SelectOptionCellStyle? cellStyle;
 
-  MultiSelectCell({
+  GridMultiSelectCell({
     required this.cellContorllerBuilder,
     GridCellStyle? style,
     Key? key,
@@ -91,10 +91,10 @@ class MultiSelectCell extends GridCellWidget {
   }
 
   @override
-  State<MultiSelectCell> createState() => _MultiSelectCellState();
+  State<GridMultiSelectCell> createState() => _MultiSelectCellState();
 }
 
-class _MultiSelectCellState extends State<MultiSelectCell> {
+class _MultiSelectCellState extends State<GridMultiSelectCell> {
   late SelectOptionCellBloc _cellBloc;
 
   @override