[Bug] Accordion headers stay left-aligned in RTL languages

Description:

Accordion headers are always left-aligned, even when the UI is in RTL languages (for example Arabic).
This causes incorrect layout direction in pages that use AccordionItem (text should align to the right in RTL).

Video demo of the issue:

https://github.com/user-attachments/assets/c7c00ada-f9e0-4a26-8390-c009967945cd

Steps to reproduce:

1. Open http://localhost:3000/account/preferences.
2. Change language to Arabic and save.
3. Observe accordion section headers.
4. Notice header text remains left-aligned instead of RTL-aligned.

Expected behavior:

Accordion header text should follow writing direction:

• LTR: start/left alignment
• RTL: start/right alignment

Actual behavior:

Accordion header text remains left-aligned in RTL pages.

Server Setup Information:

• Version of Rocket.Chat Server: 8.1.0-develop (local source)
• License Type:
• Number of Users:
• Operating System:
• Deployment Method: Local development
• Number of Running Instances:
• DB Replicaset Oplog:
• NodeJS Version:
• MongoDB Version:

Client Setup Information

• Desktop App or Browser Version: Browser (Chrome)
• Operating System: Ubuntu

Additional context

This impacts multiple screens, since AccordionItem is reused across account/admin areas.

Relevant logs:

N/A (UI alignment issue)

Start by locating the reusable AccordionItem component and reproduce the issue at /account/preferences with Arabic selected. Verify the header alignment in both Arabic and an LTR language; done means headers align to the writing direction without regressing LTR pages.