Add Guest Star related Endpoints and Topics

[Teekeks]

Twitch

Guest Star Settings

• [ ] https://dev.twitch.tv/docs/api/reference/#get-channel-guest-star-settings
• [ ] https://dev.twitch.tv/docs/api/reference/#update-channel-guest-star-settings

Guest Star Session

• [ ] https://dev.twitch.tv/docs/api/reference/#get-guest-star-session
• [ ] https://dev.twitch.tv/docs/api/reference/#create-guest-star-session
• [ ] https://dev.twitch.tv/docs/api/reference/#end-guest-star-session

Guest Star Invite

• [ ] https://dev.twitch.tv/docs/api/reference/#get-guest-star-invites
• [ ] https://dev.twitch.tv/docs/api/reference/#send-guest-star-invite
• [ ] https://dev.twitch.tv/docs/api/reference/#delete-guest-star-invite

Guest Star Slot

• [ ] https://dev.twitch.tv/docs/api/reference/#assign-guest-star-slot
• [ ] https://dev.twitch.tv/docs/api/reference/#update-guest-star-slot
• [ ] https://dev.twitch.tv/docs/api/reference/#delete-guest-star-slot
• [ ] https://dev.twitch.tv/docs/api/reference/#update-guest-star-slot-settings

EventSub

• [ ] https://dev.twitch.tv/docs/eventsub/eventsub-subscription-types/#channelguest_star_sessionbegin
• [ ] https://dev.twitch.tv/docs/eventsub/eventsub-subscription-types/#channelguest_star_sessionend
• [ ] https://dev.twitch.tv/docs/eventsub/eventsub-subscription-types/#channelguest_star_guestupdate
• [ ] https://dev.twitch.tv/docs/eventsub/eventsub-subscription-types/#channelguest_star_slotupdate
• [ ] https://dev.twitch.tv/docs/eventsub/eventsub-subscription-types/#channelguest_star_settingsupdate

OAuth Scopes:

• [ ] channel:read:guest_star
• [ ] channel:manage:guest_star
• [ ] moderator:read:guest_star
• [ ] moderator:manage:guest_star