Improves performance in WSL
Fix#1036
* Add excluded_search_path_prefixes setting
Allows filtering the paths used to search for commands
Can be useful to filter out /mnt/ in WSL for performance
* Add test for excluded_search_path_prefixes
* Apply suggestions from code review
Co-authored-by: Pablo Aguiar <scorphus@gmail.com>
Co-authored-by: Pablo Aguiar <scorphus@gmail.com>