Personal Ai Languages (DeltaV-Station#1066)

# Description

This PR adds Languages to Personal Ai devices, allowing them to act as
an interpreter for their owner. PAIs carry knowledge of all "Common"
languages(Not including anything species specific, or Rare), plus the
ability to understand(but not speak) Sign language.

# Changelog

:cl:
- add: Personal Ai devices now come loaded with knowledge of all
"Common" languages, including Sign language, allowing them to interpret
for their owner.

Resources/Prototypes/Entities/Objects/Fun/pai.yml

@@ -72,6 +72,22 @@
           Searching: { state: pai-searching-overlay }
           On: { state: pai-on-overlay }
   - type: StationMap
+  - type: LanguageKnowledge
+    speaks:
+    - TauCetiBasic
+    - SolCommon
+    - Tradeband
+    - Freespeak
+    - Elyran
+    - RobotTalk
+    understands:
+    - TauCetiBasic
+    - SolCommon
+    - Tradeband
+    - Freespeak
+    - Elyran
+    - RobotTalk
+    - Sign # It's intentional that they don't "Speak" sign language.
 
 - type: entity
   parent: PersonalAI