feat: Add frontend changes for Captain limits (#10749)

This PR introduces several improvements to the Captain AI dashboard
section:

- New billing page, with new colors, layout and meters for Captain usage
- Updated the base paywall component to use new colors
- Updated PageLayout.vue, it's more generic and can be used for other
pages as well
   - Use flags to toggle empty state and loading state
- Add prop for `featureFlag` to show the paywall slot based on feature
enabled on account
- Update `useAccount` to add a `isCloudFeatureEnabled`
- **Removed feature flag checks from captain route definitions**, so the
captain entry will always be visible on the sidebar
- Add banner to Captain pages for the following cases
   - Responses usage is over 80%
   - Documents limit is fully exhausted


### Screenshots

<details><summary>Free plan</summary>
<p>

![CleanShot 2025-01-22 at 18 37
11@2x](https://github.com/user-attachments/assets/17d3ddba-9095-4e81-9b6f-45b5f69e6a3f)
![CleanShot 2025-01-22 at 18 37
04@2x](https://github.com/user-attachments/assets/df9bb0a6-085f-45da-97d4-74cbcc33fc7e)


</p>
</details> 

<details><summary>Paid plan</summary>
<p>

![CleanShot 2025-01-22 at 18 36
45@2x](https://github.com/user-attachments/assets/a7ccf9d4-143b-49e4-8149-83c7a7985023)

![CleanShot 2025-01-22 at 20 23
57@2x](https://github.com/user-attachments/assets/c6ce35ba-e537-486d-85c8-4cc2d4e76438)


</p>
</details>

---------

Co-authored-by: Sojan Jose <sojan@pepalo.com>
Co-authored-by: Pranav <pranav@chatwoot.com>
Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>

app/javascript/dashboard/components-next/captain/assistant/ResponseCard.vue

@@ -7,6 +7,7 @@ import { dynamicTime } from 'shared/helpers/timeHelper';
 import CardLayout from 'dashboard/components-next/CardLayout.vue';
 import DropdownMenu from 'dashboard/components-next/dropdown-menu/DropdownMenu.vue';
 import Button from 'dashboard/components-next/button/Button.vue';
+import Policy from 'dashboard/components/policy.vue';
 
 const props = defineProps({
   id: {
@@ -107,8 +108,9 @@ const handleDocumentableClick = () => {
         {{ question }}
       </span>
       <div v-if="!compact" class="flex items-center gap-2">
-        <div
+        <Policy
           v-on-clickaway="() => toggleDropdown(false)"
+          :permissions="['administrator']"
           class="relative flex items-center group"
         >
           <Button
@@ -124,7 +126,7 @@ const handleDocumentableClick = () => {
             class="mt-1 ltr:right-0 rtl:right-0 top-full"
             @action="handleAssistantAction($event)"
           />
-        </div>
+        </Policy>
       </div>
     </div>
     <span class="text-n-slate-11 text-sm line-clamp-5">