Add EGoldChain Mainnet (Chain ID: 1932)

[lexthai24]

## Add EGoldChain Mainnet

Adding EGoldChain Mainnet to the chains list.

### Chain Details:
- **Chain ID:** 1932
- **Network ID:** 1932
- **Chain Name:** EGoldChain Mainnet
- **Short Name:** egold
- **Native Currency:** EGold (XAU)
- **Decimals:** 18
- **RPC Endpoint:** https://rpc.goldscan.gold
- **Block Explorer:** https://goldscan.gold
- **Website:** https://webgold.gold/

### Network Information:
- **Consensus:** QBFT (Quorum Byzantine Fault Tolerance)
- **Block Time:** 2 seconds
- **Network Type:** Production Mainnet
- **Status:** Live and operational

### Verification:
- ✅ RPC endpoint is accessible and responding
- ✅ Block explorer is live and functional
- ✅ Chain ID 1932 is unique and not in use
- ✅ All required fields are included
- ✅ JSON format is valid

### Additional Resources:
- Network Stats: https://goldscan.gold
- Documentation: https://webgold.gold/

### Checklist:
- [x] Chain ID is unique and not already in use
- [x] JSON format is valid
- [x] All required fields are included
- [x] RPC endpoint is accessible
- [x] Explorer URL is working
- [x] This is a production mainnet (not testnet)

[github-actions]

You successfully submitted a PR! Due to the amount of PRs coming in: we will only look at PRs that the CI is happy with. We can also not hold your hand getting the CI green - just look how others that where merged did it and RTFM. So as long as there is any CI check that reports an error - no human will look at this. You might be able to ask for some support after supporting the project - e.g. by sending funds to lists.eth. When you fixed things after a requested change - then you also need to (re-)request a review.