Update commands examples

[chrisdedman]

Description

This PR refactors, updates, and adds new examples for the currently available commands.

done:

• shutdown refactor
• check
• add README

[PenguinBoi12]

Those are good improvements but I think there's a few thing we could adjust.

I think this is a good PR to also add a README in the example folder explaining how to run the examples. It doesn't have to be something super complex.

[PenguinBoi12]

I feel like this example is a bit all over the place and command names aren't super descriptive. Also, I know we discussed separating the cooldown example and cooldown with error handling but I think I changed my mind and that in does make sense to have one cooldown example that shows how to catch error at the same time.

[PenguinBoi12]

I don't think we need two command for this example. Just having the first one above should be fine.

[chrisdedman]

I have two command for the reason that both are different ways to invoke the cooldown.

[PenguinBoi12]

Overall it looks pretty good. My only nit that I have is that we don't need print information when we ctx.reply. It's a repeated pattern and I don't think it adds much to the example:

print(f"{ctx.sender} invoked {ctx.body} in room {ctx.room_name}.")
await ctx.reply("Pong!")

...

print(f"Operation Not Allowed: {error}")
await ctx.reply(f"Operation not allowed: {error}")

...

print(f"ValueError: {error}")
await ctx.reply(f"ValueError: {error}")

That's said, it's not a big deal either.

[PenguinBoi12]

LGTM!