add rule AI

Documentation/ChatSystem/code_patterns.md

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+# Common Code Patterns
+
+Pattern: Player Name Lookup
+
+C++
+
+Name2IDTable
+ID2NameTable
+
+C#
+
+Dictionary<string, int>
+Dictionary<int, string>
+
+Pattern: Chat Rendering
+
+Parse text
+↓
+create item list
+↓
+render UI