Add RustChain - AI Agent DeFi 区块链 (DePIN)

[wuxiaobinsh-gif]

Add RustChain to web3-awesome

What this PR does

Adds RustChain to the Rust区块链项目 section of this web3 Chinese resource list.

Why RustChain

• DeFi + AI Agent: RustChain is a Proof-of-Antiquity blockchain that supports AI agents via MCP protocol
• Rust smart contracts: Native Rust contract development
• Hardware attestation mining: Vintage hardware earns higher mining rewards
• DePIN: Real-world hardware (old computers) provides network infrastructure

Category

This belongs in the Rust区块链项目 section alongside other Rust-based blockchain projects (exonum, nervos/ckb, holochain, grin, polkadot, substrate).

Evidence of prior work

• Already starred RustChain
• This PR is part of bounty #2862 (Add RustChain to 5 Awesome Lists)
• Similar PRs submitted to: awesome-depin (#53), awesome-blockchain-rust (#31), awesome-blockchain-cn (#69), awesome-blockchains (#39)

Wallet

wuxiaobinsh (TRC20)