config(fish): add fish completions for cli tools

dot_config/fish/functions/yy.fish

@@ -0,0 +1,8 @@
+function yy
+	set tmp (mktemp -t "yazi-cwd.XXXXXX")
+	command yazi $argv --cwd-file="$tmp"
+	if read -z cwd < "$tmp"; and [ "$cwd" != "$PWD" ]; and test -d "$cwd"
+		builtin cd -- "$cwd"
+	end
+	rm -f -- "$tmp"
+end