The same as 7d617f15, but for ivy:
+ Heavily refactored +ivy-file-search
+ Removed -z flag from all engines by default
+ Changed the behavior of the universal argument for from-cwd
interactive commands (e.g. +ivy/rg-from-cwd). It used to enable
recursive searches, but now enables inclusion of hidden and compressed
files in the search instead. *-from-cwd searches are always recursive
now.
+ Now generates +ivy/X and +ivy/X-from-cwd commands dynamically.
+ Split +ivy/project-search into +ivy/project-search-from-cwd.
Universal arguments are passed from these commands to their delegated
engine command.