feat: get_symbol_server
Adds a function to get symbols for the given module or current environment
@davidanthoff @ZacLN I have added the tests for this. Although all the tests pass online, it fails in the CI! Could you check this?

What is the use-case for this? I'm a bit hesitant to add more public facing APIs in general, and in this case I don't understand what this would be used for :)
What is the use-case for this? I'm a bit hesitant to add more public facing APIs in general, and in this case I don't understand what this would be used for :)
See https://github.com/julia-vscode/StaticLint.jl/pull/220#discussion_r552232228
Do we still need this PR, or is the plan with a new external Lint.jl package superseding this?