feat(Countries): Adding countries endpoint

lib/Models/meta-groups.model.js

@@ -0,0 +1,11 @@
+const mongoose = require('mongoose');
+const { Schema } = mongoose;
+
+const schema = new Schema({
+    group_label: { type: String, required: true },
+    group_key: { type: String, required: true },
+    group_field_type: { type: String,default:'text' }, // text, textarea, html, select
+    group_options: [{ type: String }]
+});
+
+module.exports = mongoose.model( "metagroups", schema );