Add NTLM support, replace dead lookup services, and add tests

[0x01code]

Summary

Hash Buster's crackers were pointing at services that are now dead or have
changed their APIs (nitrxgen, the old md5decrypt endpoint), so most lookups silently returned nothing. This PR replaces them
with working services, adds NTLM support, and introduces a test suite.

What changed

• New database.py – all lookup logic moved into a Database class with
  five working services: weakpass, md5decrypt (new API), gromweb,
  md5hashing (Meteor DDP-over-SockJS websocket), and crackcrypt. The old
  alpha/beta/gamma/theta/delta functions and their broken endpoints
  are removed.
• NTLM support – NTLM and MD5 are both 32 chars and can't be told apart, so
  any 32-char hash is looked up as both and both results are reported:
  [!] Hash function : MD5 / NTLM
  MD5 : (not found)
  NTLM : password
  Services that auto-detect the hash type filter matches by detected type so
  MD5 and NTLM don't cross over.
• -m flag – force a single hash type (md5, ntlm, sha1, sha256, sha384, sha512), e.g. buster -s <hash> -m ntlm. Needed because NTLM can't be
  auto-detected.
• Refactor – shared lookup() helper plus display_result() /
  inline_result() for consistent single-hash vs. file/multi-hash output.
• Tests – test_database.py with a network pytest marker for live
  lookups, plus pytest.ini, requirements.txt, and makefile updated to
  install database.py alongside the buster binary.
• README – documents NTLM behaviour and the -m flag; feature list now
  includes NTLM.

Testing

pytest (unit tests). Live lookups are gated behind -m network since they
hit third-party services