Add arachnid idle state for typing indicator

Resources/Prototypes/typing_indicator.yml

@@ -39,4 +39,5 @@
 - type: typingIndicator
   id: spider
   typingState: spider0
+  idleState: spider3 # Corvax-TypingIndicator
   offset: 0, 0.125

Resources/Textures/Effects/speech.rsi/meta.json

@@ -644,6 +644,17 @@
         },
         {
             "name": "spider2"
+        },
+        {
+            "name": "spider3",
+            "delays": [
+                [
+                    0.2,
+                    0.2,
+                    0.2,
+                    0.2
+                ]
+            ]
         }
     ]
 }