Issue Description:
When attempting to run my code, I encountered an error due to my PC's username containing the letter "ı". Unfortunately, the library does not accept this character, resulting in the following error message:

[ WARN:0@84.123] global loadsave.cpp:248 cv::findDecoder imread_('C:\Users\ca─▒n\Pictures\MEmu Photo\screenshot0.png'): can't open/read file: check file path/integrity

Steps to Reproduce:
import cv2
cv2.imread(path) # path should contain "ı" letter
The error occurs when the library encounters the letter "ı" in the Path

I expect the library to handle Path Containing 'ı'