The reconstruction includes moving the Navbar component from shared to widget because Navbar is a group of elements, and
removing the login-signup form due to changes in logic that will use a popup flow to improve the user experience without
navigating to another page for authentication.
downgrading tailwind because heroUI beta that support tailwind v4 encounter error that makes full reload pages when use
link from HeroUI, will be updated to v4 when it's fixed.
