Screenshots are of Visual Studio Code, but, all features are available in your editor of choice as long as it supports the Language Server Protocol.

Autocompletion, live syntax checking and linting

All happen automatically and instantly as you type. Linting is only available in the premium version.

Go to definition

Either right click and select "Go to Definition", or press F12.

Hover

Move the cursor over a symbol for type and location information.

Symbols

Type ctrl-alt-o for list of symbols in the current file.

Typechecking

Instant full VHDL-2008 type checking is available in the premium version.