Unicode regex support

[fduraibi]

Currently UTF8_Names_Validation by default supports English letters only. Similarly when creating an avatar based on username initials in avatar.coffee it only allow characters in this range A-Za-z0-9.

However, instead of finding every regex possible for all supported languages there are Unicode regular expressions that handles all letters: source

You can match a single character belonging to the "letter" category with \p{L}
You can match a single character not belonging to that category with \P{L}

so the regex can be written as [\p{L}0-9] instead of [A-Za-z0-9]. However, javascript does not have native support for these unicode regex.

I see two solutions for such problem:
1- Include an addon js library that supports unicode regex (such as https://github.com/slevithan/xregexp)
2- Change all hard-coded regex to variables that can be set from the Administration page just like UTF8_Names_Validation

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[MartinSchoeler]

This would be a very nice feature, but unfortunately it does not align with our current roadmap, so it's probable that it would not be implemented in the near future. I will be closing this issue for now, if we plan to add a feature like this we will reopen this issue. Thanks for the valuable feedback!