Add XRPL EVM Sidechain configuration and update xrplevm icon metadata

[vriveraPeersyst]

Title:
Add XRPL EVM Sidechain configuration and update xrplevm icon metadata

---

Pull Request Description:
This PR introduces support for the XRPL EVM Sidechain (chainId 1440000) by adding a new network configuration file and updates the corresponding icon metadata:

1. Added _data/chains/eip155-1440000.json (24 lines)

   • Defines the network as “XRPL EVM Sidechain”
   • Sets chainId and networkId to 1440000
   • Includes RPC endpoints (https://rpc.xrplevm.org, https://ws.xrplevm.org)
   • Enables EIP-155 and EIP-1559 features
   • Configures native currency as XRP (18 decimals)
   • Lists the Blockscout explorer at https://explorer.xrplevm.org

2. Modified _data/icons/xrplevm.json (3 additions, 3 deletions)

   • Replaced the original 516×516 IPFS URL with a new 500×500 URL
   • Ensured the PNG format and ipfs:// reference remain consistent

No deletions of existing network entries; purely additive configuration and minor icon adjustments.

---

Testing & Validation:

• Verified that the new chain config loads without schema errors.
• Confirmed the icon displays correctly at 500×500 resolution.

Feel free to review and suggest any further tweaks!

[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.

[vriveraPeersyst]

missing update RPC as it is currently pointing to devnet.