Added Python-like .get() method to Dictionary in GDScript #20488

Added .get() method to Dictionary class in GDScript to return the value if the key exists, or return Null if the key does not exist.

core/dictionary.h

@@ -58,6 +58,7 @@ public:
 	Variant *getptr(const Variant &p_key);
 
 	Variant get_valid(const Variant &p_key) const;
+	Variant get(const Variant &p_key, const Variant &p_default) const;
 
 	int size() const;
 	bool empty() const;