Project export and slicing

What's Changed

• Export/Import projects ✉️
• Possibility to filter inspected datasets by defining slices 🔪
• Enhanced LIME explainer with possibility to set threshold from the UI 🍋
• Simplified user management by opening access without login by default 👩‍💻
• Fixed ML Worker issues related to disconnecting after a while 🐍
• Numerous bug fixes and minor improvements 🐞

New Contributors

• @Googleton and @kevinmessiaen, new giskardians 🐢
• @p4puniya made their first contribution in #621 ✨

Full Changelog: v1.3.2...v1.4.0