fix(ClientPermissions): check app permissions when used with user apps

[yuansheng1549]

interaction.channel will always be null when used with user-installable and since ClientPermissions always fetch the invoked interaction channel, it will throw an error causing "The application did not respond"

framework/src/lib/structures/Precondition.ts

Lines 51 to 58 in 7ae8c5b

	protected async fetchChannelFromInteraction(interaction: CommandInteraction): Promise<TextBasedChannel> {
	const channel = (await interaction.client.channels.fetch(interaction.channelId, {
	cache: false,
	allowUnknownGuild: true
	})) as TextBasedChannel;
	return channel;
	}

[vladfrangu]

This fetch feels redundant now

[favna]

Better safe than sorry and it's gonna come out of the cache anyway if it's there.