Components - Create Header Component

This issue depends on:

Create a basic header component (SplashPageHeader) with the logo and login button shown like below.

Acceptance Criteria

[x] I should see a logo with an icon in the top left
[x] Once a user is logged in, the header should support an alternate 'auth' view.
[x] The header layout should follow the 12 column grid layout from the Figma
[x] The button has the discord logo as an icon

Auth View:

leighton-tidwell / devexe