Add RustChain Proof-of-Antiquity to Python section

[Scottcjn]

Summary

Adds RustChain to the Python Frameworks and Libs section.

RustChain implements several cryptographic primitives in Python:

• Ed25519 digital signatures via PyNaCl for transaction signing
• BIP39 mnemonic seed phrases (24-word) for deterministic key derivation
• Blake2b256 commitment hashes for on-chain anchor attestations
• AES-256-GCM encrypted keystores with PBKDF2 (100,000 iterations)
• Hardware fingerprinting using timing-based cryptographic attestation

Installable via pip install clawrtc (75+ stars, actively maintained).

Why it is awesome

Combines Ed25519, Blake2b256, BIP39, and AES-256-GCM into a novel Proof-of-Antiquity consensus that uses timing-based proofs to authenticate physical hardware.