feat: 集成edu-core模块并重构课程详情页视频播放

- 添加edu-core本地依赖，用于视频播放组件
- 重构课程详情页，使用CourseVideo组件替换原有视频播放逻辑
- 优化课程列表页布局和样式，修复边框单位问题
- 更新manifest.json支持多方向屏幕旋转

manifest.json

@@ -8,11 +8,17 @@
     "sassImplementationName" : "node-sass",
     /* 5+App特有相关 */
     "app-plus" : {
+        "screenOrientation" : [
+            "portrait-primary",
+            "portrait-secondary",
+            "landscape-primary",
+            "landscape-secondary"
+        ],
         "usingComponents" : true,
         "nvueStyleCompiler" : "uni-app",
-				"compatible" : {
-				    "ignoreVersion" : true
-				},
+        "compatible" : {
+            "ignoreVersion" : true
+        },
         "compilerVersion" : 3,
         "splashscreen" : {
             "alwaysShowBeforeRender" : false,