Convert the path LSP setting to a list if it is a string

[PedramNavid]

Summary

I ran into a subtle issue today where I provided a single string path:

 require('lspconfig').ruff_lsp.setup {
   init_options = {
     settings = {
     path = '~/.pyenv/shims/ruff',

Which would result in the following error:

PermissionError: [Errno 13] Permission denied: '/'

This is because we loop over the path in variable, but of course in Python, you can loop over a string and get / as the first result

for path in settings["path"]:

This change will convert the str to a simple list in case the user provides a single path rather than a list.

Test Plan

tested locally

[charliermarsh]

Good call.

[charliermarsh]

Thanks!