Modify code organization

cmdb-ui/src/views/exception/404.vue

@@ -0,0 +1,17 @@
+<template>
+  <exception-page type="404" />
+</template>
+
+<script>
+import { ExceptionPage } from '@/components'
+
+export default {
+  components: {
+    ExceptionPage
+  }
+}
+</script>
+
+<style scoped>
+
+</style>