river-control: send output on success, fix issues

Add an output arg to the success event on the callback. This allows for
implementing commands that return values, which are planned.

Replace the array of null terminated strings with a series of requests
each adding a single string to the args array. This is more idiomatic
wayland.

Add a seat argument to the run_command request to allow for proper
multi-seat support in the future.

Add missing destructor request.

0 files changed, 0 insertions, 0 deletions