feat: Redesign header with mobile menu and authenticated user profile, add search input validation to the hero section, and enhance user session data.

public/assets/icons/close-icon.svg

@@ -0,0 +1,4 @@
+<svg width="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+  <path d="M6 18L18 6" stroke="#00293D" stroke-width="2" stroke-linecap="round"/>
+  <path d="M6 6L18 18" stroke="#00293D" stroke-width="2" stroke-linecap="round"/>
+</svg>

public/assets/icons/menu-icon.svg

@@ -0,0 +1,5 @@
+<svg width="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+  <path d="M3 6H21" stroke="#00293D" stroke-width="2" stroke-linecap="round"/>
+  <path d="M3 12H21" stroke="#00293D" stroke-width="2" stroke-linecap="round"/>
+  <path d="M3 18H21" stroke="#00293D" stroke-width="2" stroke-linecap="round"/>
+</svg>