Feat(cloud)/new top up dialog (#7899)

## Summary

- Implement the new add credits (top up) dialog. 
- Refactor the subscription dialog to make different credit types easier
to understand

## Changes

- **What**: TopUpCreditsDialogContent.vue, SubscriptionPanel.vue,
/en/main.json
- **Breaking**: <!-- Any breaking changes (if none, remove this line)
-->
- **Dependencies**: <!-- New dependencies (if none, remove this line)
-->

## Review Focus

<!-- Critical design decisions or edge cases that need attention -->

<!-- If this PR fixes an issue, uncomment and update the line below -->
<!-- Fixes #ISSUE_NUMBER -->


https://github.com/user-attachments/assets/a6454651-e195-4430-bfcc-0f2a8c1dc80b

Relevant notion links:

https://www.notion.so/comfy-org/Implement-New-Top-Up-Dialog-with-Custom-Amount-Input-2df6d73d36508142b901fc0edb0d1fc1?source=copy_link

https://www.notion.so/comfy-org/Implement-Update-confusing-credits-remaining-this-month-message-2df6d73d36508168b7e5ed46754cec60?source=copy_link

src/services/dialogService.ts

@@ -368,7 +368,8 @@ export const useDialogService = () => {
         headless: true,
         pt: {
           header: { class: 'p-0! hidden' },
-          content: { class: 'p-0! m-0!' }
+          content: { class: 'p-0! m-0! rounded-2xl' },
+          root: { class: 'rounded-2xl' }
         }
       }
     })