feat(xo-server/rest-api): add groups collection

See https://xcp-ng.org/forum/post/70500

CHANGELOG.unreleased.md

@@ -7,6 +7,8 @@
 
 > Users must be able to say: “Nice enhancement, I'm eager to test it”
 
+- [REST API] Add `/groups` collection [Forum#70500](https://xcp-ng.org/forum/post/70500)
+
 ### Bug fixes
 
 > Users must be able to say: “I had this issue, happy to know it's fixed”
@@ -31,7 +33,7 @@
 
 <!--packages-start-->
 
-- xo-server patch
+- xo-server minor
 - xo-server-load-balancer patch
 - xo-web patch
 

packages/xo-server/src/xo-mixins/rest-api.mjs

@@ -319,6 +319,14 @@ export default class RestApi {
     }
 
     collections.backup = {}
+    collections.groups = {
+      getObject(id) {
+        return app.getGroup(id)
+      },
+      async getObjects(filter, limit) {
+        return handleArray(await app.getAllGroups(), filter, limit)
+      },
+    }
     collections.restore = {}
     collections.tasks = {}
     collections.users = {