JS und CSS Dateien hinzugefügt, Navbar-Component hinzugefügt, Fonts korrigiert

src/assets/lazyloading.js

@@ -0,0 +1,16 @@
+const lazyClass = 'lazy-loading';
+const lazyImages = document.querySelectorAll(`.${lazyClass}`);
+
+const lazyObserver = new IntersectionObserver((elements) => {
+    elements.forEach((element) => {
+        if (element.isIntersecting) {
+            const image = element.target;
+            image.src=image.dataset.src;
+            lazyObserver.unobserve(image);
+        }
+    })
+})
+
+lazyImages.forEach(image => {
+    lazyObserver.observe(image);
+})