Implement GitHub CI cron job to open issues on new Notion API Changelog

[MassimoGennaro]

Implement a GitHub CI cron job to open issues on new Notion API Changelog as described in #234

Main points:

• .github/scripts/monitor_notion_changelog.py, script that parse Notion API Changelog, identify new entries, create issues for new ones and update a file to keep tracks of them
• .github/workflows/notion-changelog-monitor.yml, workflow that run every day at midnight, execute the script above and commit the changes on the file with known changelo entries

Assuming to have a new label 'changelog' to tag issues created by this workflow.

[ramnes]

Excellent, thanks for the update and PR! Tests are failing but that's unrelated. I'll fix and merge soon. 👍

Do I need to do anything else than adding the label?

[MassimoGennaro]

No, it should work. If you want to test it, just update the json file removing one entry and trigger the workflow manually or wait tonight.