Add detailed file type checks and utility methods in FileUtil

Enhanced the `FileUtil` class by adding multiple methods to determine specific file types and read file content in different ways. This includes methods for ZIP, 7-Zip, MP3, WAV, RAR, PNG, JPG, and other file formats, as well as functions to handle text and binary file operations.

Signed-off-by: Ivandro Jao <Ivandrofly@gmail.com>