Update README files to reflect the transition from Flutter Distributor to Fastforge for app packaging and distribution

Author: lijy91

README-ZH.md

@@ -189,7 +189,7 @@ If you lose it, your users will be unable to upgrade!
 
 #### 打包应用
 
-> 为了简化打包的过程，这里使用了 [Flutter Distributor](https://github.com/leanflutter/flutter_distributor) ，一个专门用于打包和发布 Flutter 应用的完整工具。
+> 为了简化打包的过程，这里使用了 [Fastforge](https://fastforge.dev) ，一个专门用于打包和发布 Flutter 应用的完整工具。
 
 将 `distribute_options.yaml` 添加到你的项目根目录。
 
@@ -205,7 +205,7 @@ releases:
           build_args:
             dart-define:
               APP_ENV: dev
-      # 查看完整文档：https://distributor.leanflutter.org/configuration/makers/exe
+      # 查看完整文档：https://fastforge.dev/makers/exe
       - name: windows-exe
         package:
           platform: windows
@@ -220,15 +220,15 @@ releases:
 运行以下命令：
 
 ```
-flutter_distributor release --name prod --jobs macos-zip
+fastforge release --name prod --jobs macos-zip
 ```
 
 ##### Windows
 
 运行以下命令：
 
 ```
-flutter_distributor release --name prod --jobs windows-exe
+fastforge release --name prod --jobs windows-exe
 ```
 
 #### 获取签名

README.md

@@ -189,7 +189,7 @@ Change the file `windows/runner/Runner.rc` as follows:
 
 #### Packaging
 
-> To simplify the packaging process, [Flutter Distributor](https://github.com/leanflutter/flutter_distributor) is used here, A complete tool dedicated to packaging and publishing Flutter apps.
+> To simplify the packaging process, [Fastforge](https://fastforge.dev) is used here, A complete tool dedicated to packaging and publishing Flutter apps.
 
 Add `distribute_options.yaml` to your project root directory.
 
@@ -205,7 +205,7 @@ releases:
           build_args:
             dart-define:
               APP_ENV: dev
-      # See full documentation: https://distributor.leanflutter.org/configuration/makers/exe
+      # See full documentation: https://fastforge.dev/makers/exe
       - name: windows-exe
         package:
           platform: windows
@@ -220,15 +220,15 @@ releases:
 Run the following command:
 
 ```
-flutter_distributor release --name prod --jobs macos-zip
+fastforge release --name prod --jobs macos-zip
 ```
 
 ##### Windows
 
 Run the following command:
 
 ```
-flutter_distributor release --name prod --jobs windows-exe
+fastforge release --name prod --jobs windows-exe
 ```
 
 #### Get signature