Create landing page (Login-Page)

[cyberfutur]

Tasks:

• [x] Talk with steffi about the landing page (any special wishes)
• [x] make a design in figma
• [x] create it in svelte with skeleton
• [x] implement oauth
• [x] test login function

New login method needed over supabase:

• [x] create it in svelte with skeleton
• [x] implement oauth
• [x] test login function

[cyberfutur]

no special wishes from steffi just login over o auth