feat(@vben/playground): add full-screen examples (#4126)

* feat(@vben/playground): add full-screen examples

* chore: rm unuse class

* chore: move fullScreen demo to features router

* chore: responsive

* chore: 调整路由路径

* chore: card增加间距

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Co-authored-by: Li Kui <90845831+likui628@users.noreply.github.com>

playground/src/locales/langs/en-US.json

@@ -48,6 +48,9 @@
         "watermark": "Watermark",
         "tabs": "Tabs",
         "tabDetail": "Tab Detail Page",
+        "fullScreen": {
+          "title": "FullScreen"
+        },
         "clipboard": "Clipboard"
       },
       "breadcrumb": {

playground/src/locales/langs/zh-CN.json

@@ -48,6 +48,9 @@
         "watermark": "水印",
         "tabs": "标签页",
         "tabDetail": "标签详情页",
+        "fullScreen": {
+          "title": "全屏"
+        },
         "clipboard": "剪贴板"
       },
       "breadcrumb": {