Issue #47: Implement Mobile Menu in Navbar Component

[AnasGamal]

Issue #47: Mobile menu not implemented in navbar component

Fix:

• Added mobileMenuOpen state variable and closeMenu function.
• Created MobileNavLink component for mobile menu navigation links.
• Implemented Dialog component from @headlessui/react for the mobile menu.
• Added a button with Bars3Icon to toggle the mobile menu.
• Added @headlessui/react and @heroicons/react as dependencies.

Screenshots:

[PaulBratslavsky]

@AnasGamal I keep saying you are the best a lot. Lol. Thank you for this update.