WIP script to update action.yml with permissions based on https://github.com/octokit/app-permissions/blob/main/generated/api.github.com.json

[gr2m]

closes #3

• Fix update automation in https://github.com/octokit/app-permissions/ because it currently seems to be failing
• Install https://github.com/apps/octokit-release-notifier and configure it to create repository dispatch events for the octokit/app-permissions repository
• Setup a GitHub Actions workflow triggered by said dispatch event to update the action.yml file and create a pull request if there is any change using https://github.com/gr2m/create-or-update-pull-request-action/
• Update documentation in README.md
• Actually implement the feature 😀