Add support for MySQL and SQLite

[Bramjetten]

Todos

• Change all jsonb-columns to json-columns
• Use LOWER() instead if ILIKE in queries
• Add tests for MySQL + SQLite
• Update documentation
• Refactor Spina::ReplaceSignedIdJob to support other databases
• Remove the pg dependency
• Add MySQL + SQLite support to Spina Pro

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[Bramjetten]

Not stale either!