feat: Login with auth server page

[fzavalia]

Integrates the sign in flow with the auth dapp into the explorer website, only for the desktop version.

The feature is behind the dapps-desktop-client-with-auth-dapp which is to be toggled when the feature is ready.

The flow is:

• User opens desktop client
• User views the welcome page
• User clicks on START
• If the user has already signed in
  • The user enters the game with the already signed in account.
• If not
  • The user sees the code
  • The user clicks on CONTINUE TO SIGN IN
  • The auth dapp will open in the user browser.
  • If the request to sign in expires
    • The user will see the expired screen
  • If not
    • The game will open with the account the user signed in on the auth dapp

[github-actions]

Test this pull request

This branch can be previewed at

• stable explorer
• development explorer

[LautaroPetaccio]

Looks great!
I've left some comments to review but it should be ready to go afterwards.