[refactor] Command Pattern Implementation

[san-ghun]

The command handling in the main script could be refactored to use the Command pattern:

from abc import ABC, abstractmethod
from typing import List

class Command(ABC):
    @abstractmethod
    def execute(self, args: List[str]) -> None:
        pass

class RunCommand(Command):
    def execute(self, args: List[str]) -> None:
        run_tiny42_command(args)

class InitCommand(Command):
    def execute(self, args: List[str]) -> None:
        init_tiny42()

commands = {
    'run': RunCommand(),
    'init': InitCommand(),
    # Add other commands
}