Add ScrollToTop component and skills section

src/styles/ScrollToTop.scss

@@ -0,0 +1,36 @@
+// src/styles/ScrollToTop.scss
+.scrollToTop {
+	position: fixed;
+	bottom: 20px;
+	right: 20px;
+	cursor: pointer;
+
+	.arrow {
+		transition: transform 200ms ease-in-out;
+
+		&.up {
+			transform: rotate(0deg);
+		}
+
+		&.down {
+			transform: rotate(-180deg);
+		}
+	}
+
+	&:hover {
+		animation: pulse 1s infinite;
+		color: var(--color-accent);
+	}
+
+	@keyframes pulse {
+		0% {
+			transform: scale(1);
+		}
+		50% {
+			transform: scale(1.4);
+		}
+		100% {
+			transform: scale(1);
+		}
+	}
+}