Added a callback manager (#2)

Co-authored-by: Cynopolis <megaveganzombie@gmail.com>

CommandHandler.py

@@ -0,0 +1,18 @@
+class CommandHandler:
+    def __init__(self, print_method):
+        self.commands: dict = {}
+        self.print = print_method
+    
+    def register_callback(self, key: str, callback):
+        self.commands[key.lower()] = callback
+        
+    def parse_command(self, command : str):
+        args :list[str] = command.split(" ")
+        if args[0].lower() in self.commands:
+            return_message = self.commands[args[0].lower()](args[1:])
+            if not (return_message is None):
+                self.print(return_message)
+        else:
+            self.print("Command not recognized. Type 'help' for a list of commands.")
+        
+