feature: overriding `cmd`

[weirdan]

Did you check the docs?

• [X] I have read all the neoconf.nvim docs

Is your feature request related to a problem? Please describe.

I have a need to override the cmd entry for one of the language servers I have depending on the project directory.

From what I can understand from lspconfig plugin code, it only updates the settings key of the server configuration.

Describe the solution you'd like

I'd like to be able to override other configuration parameters, e.g. cmd and have neoconf.nvim restart the affected servers when parameters other than settings are changed.

Describe alternatives you've considered

Can't find one.

Additional context

No response