Support case with unicode characters

[karmicdude]

Greetings.
I found the problem with in telescope-fzf-native.nvim, telescope-fzy-native.nvim plugins and yours too.

It is that I can't use ignorecase or smartcase when filtering Telescope results when I try to find a word that starts with or include an uppercase letter, but I enter the letter in lower case. In my case, it's Cyrillic.

For example, list of files:

Отчет
Тотальный контроль

and my input is от, only the second line of 2-3 characters will be found, but not first.

It works fine in English, there is no uppercase/lowercase problem there. I think there's a problem with the interpretation of Unicode characters.

Would you fix the problem? There is not much activity in the other repositories and the problem is known to the developer of telescope-fzf-native for 3 years, but still not fixed. By the way, here is a similar issue nvim-telescope/telescope.nvim#1753 from someone who uses French.