Add config setting to make add to queue reply ephemeral

[Sheeley7]

I'd like to avoid spamming the chat with /play request replies from the bot. It would be super helpful if the add-query-to-queue.ts interaction.deferReply(); had a config setting to make it ephemeral like interaction.deferReply({ ephemeral: config.EPHEMERAL_REPLY });

[codetheweb]

happy to review a PR for this 👍

[Sheeley7]

Could you point me in the direction of how your configs are setup?

[codetheweb]

#1021