Change Avatar/ icon

[DandyAkira]

users should be able to change their avatar/icon

• [x] change avatar/icon
• [x] properlay shown on every client
• [ ] completely customize avatar/icon

[DandyAkira]

Now users' default icon is a gator icon

[DandyAkira]

users can also change their icon by using the images under /assets/images, and can be normally and correctly shown on other clients' sides.

[DandyAkira]

Fully custom avatars, which use any image as the avatar, will now display normally on your own client, but will be blank on other users' clients. 😢