docs: Added docs about onPlayer** events

docs/defaultEvents/player/onPlayerEquipRing.md

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+# `event` onPlayerEquipRing
+This event is triggered when player equips or unequips ring. When item is unequiped, `null` item id is returned instead.
+
+Original: [onPlayerEquipRing](https://gothicmultiplayerteam.gitlab.io/docs/0.3.0/script-reference/server-events/player/onPlayerEquipRing/)
+
+## Parameters
+* `dict` **kwargs**:
+    * `int` **playerid**: the id of the player who equips a ring.
+    * `int` **hand**: the hand id that the player is putting the ring on. For more information see **TBD**.
+    * `str` **str | null**: instance: the item instance from Daedalus scripts.
+    
+## Usage
+```python
+import g2o
+        
+@g2o.event('onPlayerEquipRing')
+def onEquip(**kwargs):
+    print(f'Player {kwargs['playerid']} has {kwargs['instance']}, used hand with id {kwargs['hand']}')
+```