✨ feat(i18n): add Right-to-left script support

[TheAwiteb]

Add support for RTL languages, such as Arabic and Hebrew, by adding the dir attribute to the body tag if the language is RTL.

What changes did you make?

I added the extra.rtl and extra.lang_rtl.<lang> to the config, with this change, we can specify the languages that are RTL and the dir attribute will be added to the body tag.

[TheAwiteb]

As I saw, after experimenting with writing an article in Arabic, this is the only change to support RTL

[welpo]

Hi Awiteb!

Thanks for this PR! I am curious: did you consider other options to implement this?

To avoid adding an extra variable and simplify the workflow, I thought of these two options:

• Set this variable in the i18n files (this way it'll always be accurate).
• Have an internal list of RTL languages inside the tabi templates. Check if current language matches one of the list. If so, implement the body change.

What are your thoughts?

[TheAwiteb]

Have an internal list of RTL languages inside the tabi templates. Check if current language matches one of the list. If so, implement the body change.

I like this, so should I add it to the is_rtl macro right?

[welpo]

Even though it will only be used once (as far as I can foresee), I think using the macro is a good idea, yes.

That way we can centralise the logic on one spot.

[TheAwiteb]

As I found, there is only 12 RTL languages which is

• Arabic (ar)
• Aramaic (arc)
• Azeri (az)
• Divehi (dv)
• Fula (ff)
• Hebrew (he)
• Kurdish (ku)
• N'ko (nqo)
• Persian (fa)
• Rohingya (rhg)
• Syriac (syc)
• Urdu (ur)

I'll make the is_rtl macro return true for them

[TheAwiteb]

Ok, I think this is better than macros

[welpo]

I've made that change + minor stuff (spacing; rename variable).

Merging now.

Many thanks for your contribution!!!