Add a password strength checker (regex practice)

[utk2103]

Add a script that scores how strong a password is and says what's missing.

Why

Best introduction to the re module there is, because every rule is one pattern. It also pairs with the password generator in #7 — generate one, then score it.

Suggested file

scripts/password_strength_checker.py

What it should do

• Usage: python scripts/password_strength_checker.py then type a password (or pass it as an argument).
• Check: length ≥ 12, lowercase, uppercase, digit, symbol, no common sequences (1234, abcd, qwerty), not in a small built-in list of very common passwords.
• Print a score out of 5, a verdict (Weak / Fair / Strong), and a bullet list of what's missing.

Acceptance criteria

• Rules are a list of (regex, message) pairs looped over — not five copy-pasted if blocks.
• Standard library only (re, argparse, getpass).
• Prefers getpass.getpass() for interactive input so the password isn't echoed or stored in shell history.
• assert-based self-check proving a known weak password scores low and a known strong one scores high.
• A comment stating this is heuristic feedback, not a security guarantee.

Inspiration

Password_Strength-checker from Awesome-Python-Scripts.

Good first issue — comment below to get assigned.