Added __on_player_message event (#1312)

* Added __on_player_sends_message event

* Docs for chat message event

* Rename to __on_player_message

* Editor support

* Added event to event_test app

* Update docs/scarpet/api/Events.md

Co-authored-by: gnembon <41132274+gnembon@users.noreply.github.com>

docs/scarpet/api/Events.md

@@ -275,6 +275,9 @@ Triggered when the player has successfully logged in and was placed in the game.
 ### `__on_player_disconnects(player, reason)`
 Triggered when a player sends a disconnect package or is forcefully disconnected from the server.
 
+### `__on_player_message(player, message)`
+Triggered when a player sends a chat message or runs a command.
+
 ### `__on_statistic(player, category, event, value)`
 Triggered when a player statistic changes. Doesn't notify on periodic an rhythmic events, i.e. 
 `time_since_death`, `time_since_rest`, and `played_one_minute` since these are triggered every tick. Event 

docs/scarpet/resources/editors/idea/4.txt

@@ -44,5 +44,6 @@ __on_player_dies(player) ->
 __on_player_respawns(player) -> 
 __on_player_disconnects(player, reason) -> 
 __on_player_connects(player) -> 
+__on_player_message(player, message) ->
 __on_explosion(pos, power, source, causer, mode, fire) ->
 __on_explosion_outcome(pos, power, source, causer, mode, fire, blocks, entities) ->

docs/scarpet/resources/editors/npp/scarpet.xml

@@ -147,6 +147,7 @@
                 __on_player_respawns
                 __on_player_disconnects
                 __on_player_connects
+                __on_player_message
                 __on_explosion
                 __on_explosion_outcome
             </Keywords>