Enhance Header and Layout components with new features and scripts

- Filtered out the Contact link from the main navigation in Header.astro and added a Contact icon that links to the contact page.
- Integrated Rocket.Chat Livechat script into Layout.astro for improved user support interaction.

src/components/widgets/Header.astro

@@ -68,9 +68,13 @@ if (!currentLang) {
 // Get translated header data - ensure we're using the current language
 const headerData = getHeaderData(currentLang);
 
+// Filter out the Contact link for the main nav
+const navLinks = headerData.links.filter(link => link.text?.toLowerCase() !== 'contact');
+const contactLink = headerData.links.find(link => link.text?.toLowerCase() === 'contact');
+
 const {
   id = 'header',
-  links = headerData.links,
+  links = navLinks,
   isSticky = false,
   isDark = false,
   isFullWidth = false,
@@ -185,7 +189,13 @@ const {
       <div class="items-center flex justify-between w-full md:w-auto">
         <div class="flex items-center space-x-4">
           {showToggleTheme && <ToggleTheme iconClass="w-6 h-6 md:w-5 md:h-5 md:inline-block" />}
-          <!-- Language Selector as Select Element -->
+          {/* Contact Icon */}
+          {contactLink && (
+            <a href={contactLink.href} aria-label="Contact" title="Contact" class="hover:text-link dark:hover:text-white flex items-center">
+              <Icon name="tabler:mail" class="w-6 h-6" />
+            </a>
+          )}
+          {/* Language Selector as Select Element */}
           <LanguageDropdown currentLang={currentPath.split('/')[1] || 'en'} />
         </div>
       </div>