Update .editorconfig

[mahdisafe]

This commit updates the .editorconfig file to ensure consistent coding style across different editors and IDEs. Changes include enforcing UTF-8 encoding, LF line endings, and inserting a final newline. Additionally, trailing whitespaces are trimmed, and the PHP files' indentation style is set to spaces with a size of 4. This update helps maintain code readability and consistency throughout the project.