feat(Incident-GraphQL-Resolver): polish README, update schema and Typ…#1649

Shikhar-Shetty wants to merge 2 commits intoServiceNowDevProgram:mainServiceNowDevProgram/code-snippets:mainfrom

Shikhar-Shetty:my-first-contributionShikhar-Shetty/code-snippets:my-first-contributionCopy head branch name to clipboard