updating coding guidelines + plan for full juliet serialization and entity system

.agent/rules/coding-guidelines.md

@@ -5,7 +5,7 @@ trigger: always_on
 Code compiles with all warning active and warning as errors.
 use static_cast or reinterpret_cast but not parenthesis for casting.
 No exceptions
-Use [[nodiscard]]
+Use [[nodiscard]] when risk of memory leak (anything returning pointer)
 auto is allowed but when its a pointer add the * and when reference adds the &
 Member variable are CamelCase
 Types are CamelCase