Header++

[carletex]

Header v1.0. We might need to tweak some stuff later, but this could be a good start.

• Initial Header styling + links
• Remove dark mode stuff
• Clean up homepage
• Figma sizes from Andrea are a bit big so did a 10% reduction in some stuff (logo size, text 20px to 18px, etc)

[carletex]

Idk when to fix this but here is one weird behavior by nprogress when clicking the Join Telegram button on the header

I didn't notice that! That sucks a bit haha. I used a instead of Link for external links, which should avoid this kind of stuff, but maybe there is an issue with nprogress (I remember there were some issue with it when we migrated to the App router)