fix: mirror help icon for arabic script rtl langs

[iDavi]

fix: mirror help icon for Arabic-script languages

Linked issue (required)

Refs #4749

Summary / motivation (required)

The help icon (info circle) in HelpModal was not mirrored for Arabic-script languages (Arabic, Persian). This PR adds a flipX prop to the Badge component wrapping the icon when the user's language uses Arabic script, matching the existing RTL mirroring behavior applied elsewhere in the UI.

https://en.wikipedia.org/wiki/Question_mark

Steps to reproduce (required)

1. Switch Anki's language to Arabic or Persian.
2. Open any dialog that shows the help badge (e.g., deck options).
3. Observe the info circle icon is not horizontally flipped.
4. Compare with other icons in RTL layouts which are properly mirrored.

How to test (required)

1. Switch Anki's language to Arabic (ar) or Persian (fa).
2. Open deck options or any screen containing the help modal badge.
3. Confirm the info circle icon is mirrored (flipped horizontally).
4. Switch back to a non-Arabic-script language (e.g., English) and confirm the icon is unflipped.

Checklist (minimum)

• I ran ./ninja check or an equivalent relevant check locally.
• I added or updated tests when the change is non-trivial or behavior changed.
  I added tests because this change don't fit any of the cases where tests arent required in CONTRIBUTING.md

Before / after behavior (optional)

Before:

After: Help icon is horizontally flipped for Arabic and Persian language users, consistent with other RTL mirroring.

Scope

• This PR is focused on one change (no unrelated edits).

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