To convert a Bitcoin private key from hexadecimal format to Wallet Import Format (WIF), you need to follow these steps:
1. **Add the version prefix**: For Bitcoin, this is `0x80`.
2. **Append the private key**: Append your private key (which is in hexadecimal).
3. **Calculate the checksum**: Perform a double SHA-256 hash on the extended key (the version prefix + private key), and take the first 4 bytes as a checksum.
4. **Append the checksum**:


