feat: import SvgPicture package to display SVG

frontend/app_flowy/packages/flowy_editor/assets/images/check.svg

@@ -0,0 +1,4 @@
+<svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">
+<rect x="2" y="2" width="12" height="12" rx="4" fill="#00BCF0"/>
+<path d="M6 8L7.61538 9.5L10.5 6.5" stroke="white" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>

frontend/app_flowy/packages/flowy_editor/assets/images/uncheck.svg

@@ -0,0 +1,3 @@
+<svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">
+<rect x="2.5" y="2.5" width="11" height="11" rx="3.5" stroke="#BDBDBD"/>
+</svg>

frontend/app_flowy/packages/flowy_editor/example/pubspec.lock

@@ -76,6 +76,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.0.1"
+  flutter_svg:
+    dependency: transitive
+    description:
+      name: flutter_svg
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.1+1"
   flutter_test:
     dependency: "direct dev"
     description: flutter
@@ -135,6 +142,27 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.8.1"
+  path_drawing:
+    dependency: transitive
+    description:
+      name: path_drawing
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.0"
+  path_parsing:
+    dependency: transitive
+    description:
+      name: path_parsing
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.0"
+  petitparser:
+    dependency: transitive
+    description:
+      name: petitparser
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "5.0.0"
   plugin_platform_interface:
     dependency: transitive
     description:
@@ -259,6 +287,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.1.2"
+  xml:
+    dependency: transitive
+    description:
+      name: xml
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "6.1.0"
 sdks:
   dart: ">=2.17.0 <3.0.0"
-  flutter: ">=2.10.0"
+  flutter: ">=2.11.0-0.1.pre"

frontend/app_flowy/packages/flowy_editor/lib/infra/flowy_svg.dart

@@ -0,0 +1,27 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_svg/svg.dart';
+
+class FlowySvg extends StatelessWidget {
+  const FlowySvg({
+    Key? key,
+    required this.name,
+    required this.size,
+    this.color,
+  }) : super(key: key);
+
+  final String name;
+  final Size size;
+  final Color? color;
+
+  @override
+  Widget build(BuildContext context) {
+    return SizedBox.fromSize(
+      size: size,
+      child: SvgPicture.asset(
+        'assets/images/$name.svg',
+        color: color,
+        package: 'flowy_editor',
+      ),
+    );
+  }
+}

frontend/app_flowy/packages/flowy_editor/lib/render/rich_text/flowy_rich_text.dart

@@ -2,6 +2,7 @@ import 'package:flowy_editor/render/rich_text/rich_text_style.dart';
 import 'package:flowy_editor/flowy_editor.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
+import 'package:flowy_editor/infra/flowy_svg.dart';
 
 class RichTextNodeWidgetBuilder extends NodeWidgetBuilder {
   RichTextNodeWidgetBuilder.create({
@@ -154,15 +155,16 @@ class _FlowyRichTextState extends State<FlowyRichText> with Selectable {
   }
 
   Widget _buildTodoListRichText(BuildContext context) {
+    final name = _textNode.attributes.todo ? 'check' : 'uncheck';
     return Row(
       crossAxisAlignment: CrossAxisAlignment.start,
       children: [
         GestureDetector(
-          child: Icon(
-              key: _decorationKey,
-              _textNode.attributes.todo
-                  ? Icons.square_rounded
-                  : Icons.square_outlined),
+          child: FlowySvg(
+            name: name,
+            key: _decorationKey,
+            size: const Size.square(20),
+          ),
           onTap: () => TransactionBuilder(_editorState)
             ..updateNode(_textNode, {
               'todo': !_textNode.attributes.todo,

frontend/app_flowy/packages/flowy_editor/pubspec.yaml

@@ -11,6 +11,7 @@ dependencies:
   flutter:
     sdk: flutter
 
+  flutter_svg: ^1.1.1+1
   provider: ^6.0.3
 
 dev_dependencies:
@@ -26,7 +27,8 @@ flutter:
 
   # To add assets to your package, add an assets section, like this:
   assets:
-    - document.json
+    - assets/images/uncheck.svg
+    - assets/images/
   #   - images/a_dot_burr.jpeg
   #   - images/a_dot_ham.jpeg
   #