[Stream] Twitch API

[hoonhan]

• [x] Connect the Twitch API to our front end application

• [x] Streamer information at the top, Stream title at the bottom. (Let's consider the number of viewers later.)

• [x] Pop-up help message when clicking '?' button (Dialog modal in Vuetify)

[hoonhan]

• We don't use API for the sake of simplicity; rather, embed the twitch player.
• Locate all information related to the stream below the player.

[hoonhan]

• [ ] Special Message Overlay on the video

• [ ] Disable full screen mode

• [ ] Tutorial

[hoonhan]

@tsook

• [ ] variable X is the special message to be delivered to the streamer