MeterGroup docs added

doc/metergroup/ImportDoc.vue

@@ -0,0 +1,18 @@
+<template>
+    <DocSectionText v-bind="$attrs" />
+    <DocSectionCode :code="code" hideToggleCode importCode hideCodeSandbox hideStackBlitz />
+</template>
+
+<script>
+export default {
+    data() {
+        return {
+            code: {
+                basic: `
+import MeterGroup from 'primevue/metergroup';
+`
+            }
+        };
+    }
+};
+</script>