docs: Added docs about onPlayer** events

docs/defaultEvents/player/onPlayerChangeMaxHealth.md

@@ -0,0 +1,19 @@
+# `event` onPlayerChangeMaxHealth
+This event is triggered when player maximum health changes.
+
+Original: [onPlayerChangeMaxHealth](https://gothicmultiplayerteam.gitlab.io/docs/0.3.0/script-reference/server-events/player/onPlayerChangeMaxHealth/)
+
+## Parameters
+* `dict` **kwargs**:
+    * `int` **playerid**: the id of the player whose maxium health points gets changed.
+    * `int` **oldMaxHP**: the previous maximum health points of the player.
+    * `int` **newMaxHP**:  the new maximum health points of the player.
+    
+## Usage
+```python
+import g2o
+        
+@g2o.event('onPlayerChangeMaxHealth')
+def onChangeMaxHealth(**kwargs):
+    print(f'Player {kwargs['playerid']} changed maximum health: {kwargs['oldMaxHP']} -> {kwargs['newMaxHP']}')
+```