Add implementation of `03_A_Star` in Python, C++, Go, or Rust

### 🌐 Re-implement `03_A_Star` in another language

This folder contains a Java or Prolog implementation of a classic AI algorithm or system:

```

src/03_A_Star/

```

You're invited to contribute the **same logic** in a different language, such as:

- Python 🐍
- C++ 💻
- Go 🦫
- Rust 🦀

---

### 📁 Folder Structure

Create a new file inside the **same folder**:
- `main.py` for Python
- `main.cpp` for C++
- `main.go` for Go
- `main.rs` for Rust

✅ Don't delete or change existing code.

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### 🧠 Tips

- Stick to the logic shown in the Java/Prolog version.
- Add comments explaining your approach.
- Keep your code modular and beginner-friendly.

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Once done, open a PR referencing this issue.