Better command functions and java parity

The playsound command is much better on java compared to bedrock for certain actions. On java, the sound gets played to the player if you select "player" as the sound source and doesn't get quieter as you move away. On bedrock meanwhile, there is no sound source function for the command and the sound gets quieter as you move away from your position when the sound plays. It would be a great addition if added and makes maps much better. Also on another note, bedrock is missing things that java has. For example, java has the debug stick while bedrock doesn't have one. Another thing that needs fixing is that @s doesn't work when using command blocks and just returns "No targets matching selector" and the closest thing is @initiator but even that doesn't work and is exclusive to NPCs. Hopefully you do consider these things as I just want some better commands