Debugging neuron-mode for doom-emacs

After reinstalling via Nix, the file path changes.

As such, neuron-mode has to be rebuilt.

To do so, first remove neuron from the :tools section.

Then, run ./.emacs.d/bin/doom purge.

Next add neuron back, run ./.emacs.d/bin/doom sync.

The path to neuron should be regenerated after the rebuild.