Function is_nsis_installer 

pub fn is_nsis_installer(path: &Path) -> bool

Check if file contains NSIS installer signature.

NSIS installers are Windows executables that contain a specific signature string. This function searches the first 8KB of the file for “Nullsoft.NSIS.exehead”.

Returns

true if the NSIS signature is found within the first 8KB, false otherwise or on IO error.