🔗 ChainList PR-Text

[BlockGoldCoin]

feat: Add BlockGoldCoin DevNet (ChainID 12345) to ChainList

This PR adds BlockGoldCoin DevNet to the ChainList registry.

• Chain Name: BlockGoldCoin DevNet
• Chain ID: 12345
• RPC: https://rpc.blockgoldcoin.io
• Currency: BGC (BlockGold)
• Explorer: https://explorer.blockgoldcoin.io
• Features: EIP155, EIP1559
• Source: https://github.com/sadikdogan/blockgoldcoin
• FinalSeal: ✅ enabled