bidirectional text support

First and foremost consider this:

Retroarch UI does not support BiDirectional text. so menu items with both Persian and English text in localized UIs, are shown incorrectly.

Description

Retroarch menu items with bidirectional text which start with RTL languages (Persian, Arabic, Hebrew,...) should be shown in RTL. but it is always shown in LTR.

a bidirectional text is one that has words from both RTL and LTR languages in it. like a combination of Persian and English.

Expected behavior

Bidirectional text should be oriented cocrrectly.

bidi text should be shown in RTL. for instance, look at text below:

"تنظیمات MIDI را تغییر دهید."

correct render:

Actual behavior

bidirectional text that starts with RTL text, is shown incorrectly.
for this Example, incorrect render (screenshot from Retroarch):

Steps to reproduce the bug

1. set Retroarch UI language to Persian
2. look at any menu item with both Persian and English text on it.
   for instance, in Retroarch Version 1.10.30 in menu: ساماندهی -> صدا there is a bidirectional text in the MIDI menu item description. (using image below you can find that menu item.)
   

Version/Commit

You can find this information under Information/System Information

• RetroArch: 1.10.30 - snap version

Environment information

• OS: Linux 5.13.0-30-generic 20.04.1-Ubuntu x86_64 GNU/Linux
• packaging: snap Rev 1396

No source files or tests are named. Reproduce the issue by setting the RetroArch UI language to Persian and opening the MIDI menu item described in the report, then trace the UI text-rendering and localization paths. Done means mixed Persian and English menu text beginning with RTL text renders in the expected RTL order.