bedrock: Incorrect NPC packet serialization

These packets and information were taken from version 1.19.31
It is possible, yet unlikely, that this is specific to this version

There is a possible packet with request type of 6:

{"runtime_entity_id":"13","request_type":6,"command":"","action_type":"set_actions","scene_name":""}

It appears to be the opening equivalent of execute_closing_commands execute_opening_commands
As NPC are capable of executing commands when they are interacted with

Additionally,
NPC packets with request type of 1 (or "execute_action") are parsed incorrectly, according to the documentation action type is an enum, however, when request_type is 1 (or "execute_action") it is actually an integer referring to the button which was pressed, starting from 0, which corresponds to the leftmost button

note: despite being an int, the client limits the number of possible buttons you can add to 6 buttons, so action_type will never be higher than 5 if the request_type is 1

Similar behaviour is observed when request_type equals 4 (or set_skin) in which the action_type actuall corresponds to the NPC's set skin (again, counting from 0, left to right) the highest action_type for setting the NPC's skin is 34 in the current update, however, this may change in the future

Lastly, I believe that the notes for the Command field name are somewhat misleading as it isn't necessarily a command
ie: when setting dialogue, it is equal to what is being typed and in set_actions it is equal to a JSON object containing all the possible NPC actions (it effectively override the action related entity data)

NOTE: All of this data is from the Bedrock edition of the game, while the Education Edition may behave in the same way, I have no way of confirming this, however, it is likely that it does

Start with the packet_npc_request documentation and the Bedrock 1.19.31 packet examples in the issue. Check how request_type 1, 4, and 6 interpret action_type and how Command is described. Done means the NPC packet data and notes represent these observed Bedrock behaviors without assuming they apply to other versions.