Create documentation for Quicknode provider feature

[mconnelly8]

• [ ] Update docs : QuickNodes is now default provider.
• [ ] Update docs : there is rate limit of QuickNode provider & create new user account in case of limit reached by using web3.js referral link for supporting web3.js lib
• [ ] Adding External providers guide: how to create instance of Quicknode provider and use with web3 for custom Network, Transport and token , example code is https://github.com/web3/web3.js/blob/bfe276956517245d580af53c2c28203825572bc8/packages/web3/test/integration/web3RPCProviders.test.ts#L32

[jdevcs]

Documentation of Quicknode rate limit

[danforbes]

Ready for review https://github.com/web3/web3.js/pull/7119