added persian/farsi support

[pcmehrdad]

Why

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update
• Code refactoring
• API changes
• Performance improvement
• Test addition or update

AI Usage

• AI was used to write this
• AI was used to review this

Add Persian (fa-IR) translation with RTL support

Adds a complete Persian (Farsi) locale to the frontend.

• Translates all 258 UI strings (fa.json) and all 6 HelpDoc articles
• Registers fa-IR in the locale list, language picker (🇮🇷 flag), and HelpDoc registry
• Adds RTL support: sets dir="rtl" for RTL locales and loads Tabler's RTL stylesheet when Persian is active

All messages validated as valid ICU and verified at full key-parity with en.json; tsc passes.

[nginxproxymanagerci]

Docker Image for build 2 is available on DockerHub:

nginxproxymanager/nginx-proxy-manager-dev:pr-5582

Note

Ensure you backup your NPM instance before testing this image! Especially if there are database changes.
This is a different docker image namespace than the official image.

Warning

Changes and additions to DNS Providers require verification by at least 2 members of the community!

[pcmehrdad]

Thanks for building the image
Yest I just tested and all sections are working perfect