Better formatting on autocomplete documentation popups
Autocomplete items have different icons for different types
Diagnostics
Evaluation of user code is now sandboxed in a self-contained environment rather than running in the server process's main - environment table
Non-relative and project-relative imports now fully evaluate rather than flychecking only (this fixes issues with some popular libraries such as spork/path)
On-hover documentation
Thanks to eval sandboxing, the server process environment's symbols no longer appear in autocomplete
Misc
Some prep work implemented setting up Signature Helps