feat: Support drop DSL file into the browser to create app (#20706)

Co-authored-by: crazywoola <100913391+crazywoola@users.noreply.github.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

web/i18n/en-US/app.ts

@@ -87,6 +87,7 @@ const translation = {
     appCreateDSLErrorPart3: 'Current application DSL version: ',
     appCreateDSLErrorPart4: 'System-supported DSL version: ',
     appCreateFailed: 'Failed to create app',
+    dropDSLToCreateApp: 'Drop DSL file here to create app',
   },
   newAppFromTemplate: {
     byCategories: 'BY CATEGORIES',

web/i18n/zh-Hans/app.ts

@@ -87,6 +87,7 @@ const translation = {
     appCreateDSLErrorPart3: '当前应用 DSL 版本：',
     appCreateDSLErrorPart4: '系统支持 DSL 版本：',
     appCreateFailed: '应用创建失败',
+    dropDSLToCreateApp: '拖放 DSL 文件到此处创建应用',
     Confirm: '确认',
   },
   newAppFromTemplate: {