feat: Enable Capacity Config UI (#5164)

- Enables Capacity Config in UI
- Rewrite auto assignment Logic to consider only online agents

fixes: #4990

app/javascript/dashboard/routes/dashboard/settings/inbox/settingsPage/CollaboratorsPage.vue

@@ -49,9 +49,8 @@
         </p>
       </label>
 
-      <!-- disabling this block temporarily -->
       <div
-        v-if="enableAutoAssignment && isEnterprise && false"
+        v-if="enableAutoAssignment && isEnterprise"
         class="max-assignment-container"
       >
         <woot-input