[Qt 版本更新及HttpClient组件重构]: 主要更新了Qt版本，并重构了HttpClient组件，提升了JSON请求和上传下载功能…

…的支持。

- 更新了Qt版本，从6.7.2升级到6.8.1，并相应更新了`action.yml`文件中的Qt版本号，以及`CMakeLists.txt`和`HttpClient/*.pro`文件中的相关配置。
- 重构了`HttpClient`组件，引入了新的`httpclient.hpp`和`httpclient.cc`文件，替换了原有的`httpclient.h`和`httpclient.cpp`文件，提供了更加现代化的HTTP客户端功能。
- 移除了旧的`MainWindow`类相关文件，包括`mainwindow.h`和`mainwindow.cpp`，因为新的`HttpClient`组件不再依赖于图形界面。
- 更新了`.vscode/settings.json`文件，修改了Qt的路径和版本信息，以适应新的Qt版本。
- 添加了`.github/dependabot.yml`文件，启用了Dependabot版本更新，以自动维护项目依赖。
- 更新了`README.md`文件，简要描述了`HttpClient`组件的新功能和用途。
- 修改了跨平台构建脚本，包括`packaging/macos/build.py`、`packaging/macos/package.sh`、`packaging/ubuntu/build.py`和`packaging/windows/build.py`，以适应新的Qt版本和路径。

.github/actions/install-dependencies/action.yml

@@ -13,7 +13,7 @@ inputs:
   qt_ver:
     description: 'qt version'
     required: false
-    default: '6.7.2'
+    default: '6.8.1'
     type: string
 
 runs:
@@ -48,7 +48,7 @@ runs:
         gcc --version
 
     - name: Install Qt
-      uses: jurplel/install-qt-action@v3
+      uses: jurplel/install-qt-action@v4
       with:
         version: ${{ inputs.qt_ver }}
         modules: ${{ inputs.qt_modules }}

.github/dependabot.yml

@@ -0,0 +1,11 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file
+
+version: 2
+updates:
+  - package-ecosystem: "github-actions" # See documentation for possible values
+    directory: "/" # Location of package manifests
+    schedule:
+      interval: "weekly"

.vscode/settings.json

@@ -4,6 +4,6 @@
     },
     "cmake.generator": "Ninja",
     "cmake.environment": {
-        "PATH": "C:\\Qt\\6.7.2\\msvc2019_64\\bin;${env:PATH};"
+        "PATH": "C:\\Qt\\6.8.1\\msvc2022_64\\bin;${env:PATH};"
     }
 }

HttpClient/CMakeLists.txt

@@ -1,7 +1,5 @@
-set(PROJECT_SOURCES main.cpp mainwindow.cpp mainwindow.h httpclient.h
-                    httpclient.cpp)
+set(PROJECT_SOURCES main.cpp httpclient.cc httpclient.hpp)
 
 qt_add_executable(HttpClient MANUAL_FINALIZATION ${PROJECT_SOURCES})
-target_link_libraries(HttpClient PRIVATE Qt6::Widgets Qt6::Network
-                                         Qt6::Concurrent)
+target_link_libraries(HttpClient PRIVATE Qt6::Network Qt6::Concurrent)
 qt_finalize_executable(HttpClient)

HttpClient/HttpClient.pro

@@ -16,13 +16,11 @@ DEFINES += QT_DEPRECATED_WARNINGS
 #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
 
 SOURCES += \
-    httpclient.cpp \
-    main.cpp \
-    mainwindow.cpp
+    httpclient.cc \
+    main.cpp                             
 
 HEADERS += \
-    httpclient.h \
-    mainwindow.h
+    httpclient.hpp
 
 # Default rules for deployment.
 qnx: target.path = /tmp/$${TARGET}/bin