types: Add tagged type unions for channel types

[suneettipirneni]

Please describe the changes this PR makes and why it should be merged:

Closes #61

Reference Discord API Docs PRs or commits:
https://discord.com/developers/docs/resources/channel#channel-object-channel-types

[vladfrangu]

Mad lad for tackling this issue, and overall, great start! Still needs some work tho, as well as the same change in v8 :D

[suneettipirneni]

as well as the same change in v8 :D

😦

[suneettipirneni]

So I tried my best to integrate the changes you requested, let me know if there's anything else.

I'll work on v8 after v9 is finalized.

Also if you need to test the typings I'm using this file to verify everything is working as expected:

/* eslint-disable @typescript-eslint/no-unused-vars */
import { APIChannel, ChannelType } from '.';

const guildTextChannel: APIChannel = {
	id: '12',
	type: ChannelType.GuildText,
	name: 'general',
	position: 6,
	permission_overwrites: [],
	rate_limit_per_user: 2,
	nsfw: true,
	topic: 'topic',
	last_message_id: '12',
	default_auto_archive_duration: 60,
};

const guildNewsChannel: APIChannel = {
	id: '12',
	type: ChannelType.GuildNews,
	name: 'general',
	position: 6,
	permission_overwrites: [],
	nsfw: true,
	topic: 'topic',
	last_message_id: '12',
	default_auto_archive_duration: 60,
};

const guildNewsThread: APIChannel = {
	id: '12',
	type: ChannelType.GuildNewsThread,
	name: 'general',
	position: 6,
	permission_overwrites: [],
	nsfw: true,
	last_message_id: '12',
	thread_metadata: {
		archived: false,
		auto_archive_duration: 1440,
		archive_timestamp: 'date',
		locked: false,
	},
};

const guildVoiceChannel: APIChannel = {
	id: '12',
	type: ChannelType.GuildVoice,
	name: 'general',
	position: 6,
	permission_overwrites: [],
	nsfw: true,
	bitrate: 64000,
	user_limit: 0,
	parent_id: null,
	rtc_region: null,
};

const DMChannel: APIChannel = {
	id: '12',
	type: ChannelType.DM,
	recipients: [],
	last_message_id: '12',
};

const groupDMChannel: APIChannel = {
	id: '12',
	type: ChannelType.GroupDM,
	recipients: [],
	last_message_id: '12',
	owner_id: '12',
	icon: null,
};

const categoryChannel: APIChannel = {
	id: '12',
	type: ChannelType.GuildCategory,
	name: 'general',
	position: 6,
	permission_overwrites: [],
	nsfw: true,
};

const storeChannel: APIChannel = {
	id: '12',
	type: ChannelType.GuildStore,
	name: 'general',
	position: 6,
	permission_overwrites: [],
	nsfw: true,
	parent_id: null,
};

const threadChannel: APIChannel = {
	id: '12',
	guild_id: '12',
	owner_id: '12',
	parent_id: '12',
	name: 'general',
	type: ChannelType.GuildPublicThread,
	last_message_id: '12',
	member_count: 1,
	message_count: 5,
	rate_limit_per_user: 2,
	thread_metadata: {
		archived: false,
		auto_archive_duration: 1440,
		archive_timestamp: 'date',
		locked: false,
	},
};

[vladfrangu]

Small issues, please fix in non-deno ones

[suneettipirneni]

So v8 will pretty much be the same, just without the threads right?

[vladfrangu]

Yep yep

[vladfrangu]

Some more requested changes for you, please apply them to v9/v8 and then run the deno script 🙏

[vladfrangu]

We're reaching a point where having to keep these types updates is probably gonna be annoying to do..

[vladfrangu]

Well what do you know, the curse follows everyone as this PR needs a rebase