Crew AI fixes:

- Characters can use oxygenite shards (or any other item with an "oxygensource" tag) in diving suits/masks.
- AIObjectiveFindDivingGear doesn't count as being completed if the character has diving gear in their inventory unless the character has equipped the gear.
- AIObjectiveGetItem doesn't count as being completed if equipping the target item is required and the character hasn't equipped it yet.

Barotrauma/BarotraumaShared/Content/Items/Artifacts/artifacts.xml

@@ -91,9 +91,8 @@
 
   <Item
     name="Oxygenite Shard"
-    category="Alien"
-    
-    tags="alien,smallitem"
+    category="Alien"    
+    tags="alien,smallitem,oxygensource"
     impacttolerance="8">
 
     <Sprite texture="artifact.png" depth="0.7" sourcerect="119,0,9,32"/>

Barotrauma/BarotraumaShared/Content/Items/Diving/divinggear.xml

@@ -3,7 +3,7 @@
   <Item
     name="Oxygen Tank"
     category="Equipment,Misc"
-    Tags="smallitem"
+    Tags="smallitem,oxygensource"
     
     price="50">