Port friend notifier -> TypeScript

[WebGL3D]

What :video_game:

This review ports the friend notifier over to using TypeScript, from vanilla JavaScript. It also previously was built with the expectation of a background page, and state. This update will allow compatibility when we move over to manifest V3.

The following implementation changes have been made:

• We use the chrome.alarms API now, for manifest V3 compatibility. Which means we're checking for updates once/minute, instead of once every 10 seconds.
• We are now using followings to determine if the user wants notifications about this user, rather than a block list specifically for this notifier. If you don't want to know when your friend joins a game, don't follow them.
• We now rely on declarativeNetRequest, instead of chrome.webRequest, for modifying the request to fetch the authentication ticket, during game launch.
• We no longer allow custom notifier sounds for this notifier, which is in-line with current browser support for push notifications.

Preview :framed_picture:

Screenshots of the notification before, and after.

Before :older_adult:

After :baby:

Follow button is now "Join", and pulls from translated resources.