[PM-28979] Handle RTL positioning for inline autofill button

[ttv20]

This PR has been created with AI and tested by me

I checked if the LTR is still LTR, I run lint and prettier.

🎟️ Tracking

#10519

📔 Objective

• capture an input field's text direction when focusing to inform inline menu positioning
• place the inline autofill button on the visual start side for RTL inputs while keeping current LTR behavior

📸 Screenshots

edu.il

opus.co.il (click on "כניסה למערכת" on the top left)

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[bitwarden-bot]

Thank you for your contribution! We've added this to our internal tracking system for review.
ID: PM-28979
Link: https://bitwarden.atlassian.net/browse/PM-28979

Details on our contribution process can be found here: https://contributing.bitwarden.com/contributing/pull-requests/community-pr-process.