feat: Add support for MongoDB query comment (#8928)

src/Routers/AggregateRouter.js

@@ -19,6 +19,10 @@ export class AggregateRouter extends ClassesRouter {
       options.explain = body.explain;
       delete body.explain;
     }
+    if (body.comment) {
+      options.comment = body.comment;
+      delete body.comment;
+    }
     if (body.readPreference) {
       options.readPreference = body.readPreference;
       delete body.readPreference;

src/Routers/ClassesRouter.js

@@ -166,6 +166,7 @@ export class ClassesRouter extends PromiseRouter {
       'subqueryReadPreference',
       'hint',
       'explain',
+      'comment',
     ];
 
     for (const key of Object.keys(body)) {
@@ -215,6 +216,9 @@ export class ClassesRouter extends PromiseRouter {
     if (body.explain) {
       options.explain = body.explain;
     }
+    if (body.comment && typeof body.comment === 'string') {
+      options.comment = body.comment;
+    }
     return options;
   }