Support Advanced JWE Attack Features

[hahwul]

Description:
jwt-hack supports JWE encode/decode but lacks advanced attack capabilities for JWE, such as encrypted key brute-forcing or padding oracle attacks. As JWE usage grows, adding these features would make the tool more robust.

Proposed Solution:

• Add a JWE-specific crack mode for brute-forcing encrypted keys.
• Implement padding oracle attack detection for vulnerable JWE implementations.
• Enhance decode to flag potential JWE misconfigurations.

Use Case:
Security researchers testing modern APIs with JWE would benefit from targeted attack modules.