Author Updates sigs.py Script with Verification Mode

The author has updated their sigs.py script to include a verification mode. This Python script allows for hashing files and verifying hashes from manifests. It can replace tools like md5sum, sha1sum, etc., and supports various hash types such as sha512, sha3-224, and sha3-384. The addition of the verification mode enables the validation of hashes by automatically determining the type of hash used.