kitty:daemon: Use TMPDIR and support multi-user

.config/kitty/get_cwd.sh

@@ -5,9 +5,11 @@
 # Print the current working directory of the focused kitty window. Returns 4 if
 # none exist or is focused.
 
+socket_path="${TMPDIR:-/tmp}/kitty.$USER/kitty.sock"
+
 # NOTE: the backticks are used for hacky line-continuation, taken from
 #       https://stackoverflow.com/a/7729087/2092762c9
-kitten @ --to unix:/tmp/mykitty ls \
+kitten @ --to unix:"$socket_path" ls \
 	| jq -er ".[]`
 		` | select(.is_focused).tabs.[]`
 		` | select(.is_focused).windows.[]`