eslint rule that will flag when useAsync is used without handling 'error' key.

Useful links

• eslint custom rule tutorial used as basis for this project: https://eslint.org/docs/latest/extend/custom-rule-tutorial
• eslint AST explorer: https://astexplorer.net/
• eslint selectors: https://eslint.org/docs/latest/extend/selectors
• eslint rule source files as more examples: https://github.com/eslint/eslint/tree/main/lib/rules