Implement AES Encryption from Scratch in Python (No External Crypto Libs)

### 🔐 Task:
Recreate the AES encryption algorithm from scratch in Python for educational purposes.

### ⚠️ Notes:
- Don't use `pycryptodome`, `cryptography`, or other libraries.
- Just implement basic AES-128 ECB mode.

### 📂 Suggested File:
`algorithms/python/aes_from_scratch.py`

This is a challenging yet rewarding cryptographic exercise.

Start with the suggested path algorithms/python/aes_from_scratch.py and confirm how this repository organizes Python algorithm implementations. Implement and verify AES-128 in ECB mode without external cryptography libraries; done means the algorithm works for standard AES test vectors and the relevant checks pass, if the repository provides them.

Written by the indexing model from the issue text.