Add function to be used for experimental fish-fzf completion

assets/default/fish/functions/__fzf_complete.fish

@@ -0,0 +1,16 @@
+function __fzf_complete --description "Prints values passed as args or through stdin for completion through fzf, if available. This can be disabled by using ENABLE_FZF_COMPLETE"
+    set -l cmd ""
+    if count $argv > /dev/null
+        set cmd "string split ' ' $argv"
+    else
+        set cmd "cat"
+    end
+
+    # Make fzf completion opt-in
+    if type -q fzf ;and [ -n $ENABLE_FZF_COMPLETE ]
+        set  -l last_arg (string trim (commandline -t))
+        eval $cmd | fzf --query=$last_arg -d " " --exit-0 --select-1 --height 40% --min-height 10 --reverse
+    else
+        eval $cmd
+    end
+end