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/EmptyStateLayout.vue

@@ -1,4 +1,6 @@
 <script setup>
+import Policy from 'dashboard/components/policy.vue';
+
 defineProps({
   title: {
     type: String,
@@ -8,6 +10,10 @@ defineProps({
     type: String,
     required: true,
   },
+  actionPerms: {
+    type: Array,
+    default: () => [],
+  },
 });
 </script>
 
@@ -16,7 +22,7 @@ defineProps({
     class="relative flex flex-col items-center justify-center w-full h-full overflow-hidden"
   >
     <div
-      class="relative w-full max-w-[940px] mx-auto overflow-hidden h-full max-h-[448px]"
+      class="relative w-full max-w-[960px] mx-auto overflow-hidden h-full max-h-[448px]"
     >
       <div
         class="w-full h-full space-y-4 overflow-y-hidden opacity-50 pointer-events-none"
@@ -39,7 +45,9 @@ defineProps({
               {{ subtitle }}
             </p>
           </div>
-          <slot name="actions" />
+          <Policy :permissions="actionPerms">
+            <slot name="actions" />
+          </Policy>
         </div>
       </div>
     </div>