Update README.md

[ajl388]

[Please describe your pull request here] Added more resources and organized alphabetically.

Checklist

• [ x] The URL is not already present in the list (check with CTRL/CMD+F in the raw markdown file).
• [ x] Each description starts with an uppercase character and ends with a period.
  Example: solc-js - JavaScript bindings for the compiler.
• [ x] Drop all A / An prefixes at the start of the description.
• [x ] Avoid using the word Solidity in the description.

[bkrem]

Thanks for the contribution! 🙏