Partially implement move command

Works:

- move [container|window] to workspace <name>
    - Note, this should be able to move C_CONTAINER but this is untested
- move [workspace] to output [left|right|up|down|<name>]

Not implemented yet:

- move [left|right|up|down]
- move scratchpad
- move position

sway/commands.c

@@ -162,6 +162,7 @@ static struct cmd_handler command_handlers[] = {
 	{ "focus", cmd_focus },
 	{ "kill", cmd_kill },
 	{ "layout", cmd_layout },
+	{ "move", cmd_move },
 	{ "reload", cmd_reload },
 };