chore: Sets up store for teams settings page (#1727)

Co-authored-by: Pranav Raj S <pranav@chatwoot.com>

app/javascript/dashboard/store/modules/specs/teamMembers/mutations.spec.js

@@ -0,0 +1,12 @@
+import { mutations, ADD_AGENTS_TO_TEAM } from '../../teamMembers';
+import teamMembers from './fixtures';
+
+describe('#mutations', () => {
+  describe('#ADD_AGENTS_TO_TEAM', () => {
+    it('Adds team members to records', () => {
+      const state = { records: {} };
+      mutations[ADD_AGENTS_TO_TEAM](state, { data: teamMembers[0], teamId: 1 });
+      expect(state.records).toEqual({ 1: teamMembers[0] });
+    });
+  });
+});