Add docs to convert from Ethers v6 to Ethers v5

[MantisClone]

To convert Ethers v6 to Ethers v5, try the following snippets:

convertV6SignerToV5Signer.ts

import { providers as ethersV5Providers, Signer as ethersV5Signer } from 'ethers-v5';
import { Signer as ethersV6Signer } from 'ethers-v6';

export async function convertV6SignerToV5Signer(v6Signer: ethersV6Signer, providerUrl: string) {
  const address = await v6Signer.getAddress();
  const provider = new ethersV5Providers.JsonRpcProvider(providerUrl);
  const v5Signer = provider.getSigner(address);
  return v5Signer;
}

package.json

{
  "name": "your-project-name",
  "version": "1.0.0",
  "description": "Your project description",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "dependencies": {
    "ethers-v5": "npm:ethers@^5.7.2", // Alias for ethers v5
    "ethers-v6": "npm:ethers@^6.0.0", // Alias for ethers v6
  },
  "author": "Your Name",
  "license": "ISC"
}