Dependencies: Make dependencies optional

[seclerp]

Summary

Currently, the plugin defines such plugin dependencies:

• [x] Database
• [ ] Terminal (feature in progress)
• [ ] F# (feature in progress)
• [ ] AI Assistant (feature planned)

All of them could be made non-required dependencies to not bother users with dependencies that they don't want to install/enable.

References

• 📖 Optional plugin dependencies docs