Support for XbK 30/31

[kentico-ericd]

Motivation

• Sets proper supported/unsupported status of actions/reports for Xbk 30/31
• Migrates "Class/table validation" report to XbK
• Migrates "Page type field analysis" report to XbK
• Migrates "Task processing analysis" report to XbK
• Migrates "Unused page type summary" report to XbK

Checklist

• Code follows coding conventions held in this repo
• Automated tests have been added
• Tests are passing
• Docs have been updated (if applicable)
• Temporary settings (e.g. variables used during development and testing) have been reverted to defaults