feat(plugin): add virtual plugin instances

app/locales/en-US.json

@@ -839,6 +839,10 @@
       "source": "创建插件分身失败：{reason}",
       "target": "Failed to create plugin clone: {reason}"
     },
+    {
+      "source": "请先卸载该插件的分身：{instances}",
+      "target": "Uninstall this plugin's instances first: {instances}"
+    },
     {
       "source": "{domain} 站点己存在",
       "target": "Site {domain} already exists"

app/locales/zh-TW.json

@@ -835,6 +835,10 @@
       "source": "创建插件分身失败：{reason}",
       "target": "建立插件分身失敗：{reason}"
     },
+    {
+      "source": "请先卸载该插件的分身：{instances}",
+      "target": "請先解除安裝該插件的分身：{instances}"
+    },
     {
       "source": "{domain} 站点己存在",
       "target": "{domain} 站點已存在"