feat: integrate schema.org support and enhance component structure

- Added schema.org support by introducing `schema-dts` for structured data in components.
- Updated `Head`, `BaseLayout`, and various page components to accept and utilize schema props for better SEO.
- Created new utility schemas for blog posts and website to standardize structured data implementation.
- Enhanced the `SocialLinks` section by utilizing dedicated icon components for improved maintainability.
- Refactored the `Header` component to improve accessibility and structure.
- Introduced new icons for social links and integrated them into the layout.

src/components/Icons/LinkedIn.astro

@@ -0,0 +1,21 @@
+<style lang="scss">
+	@use "../../scss/variables" as *;
+
+	a {
+		color: $colorText;
+		display: inline-block;
+		margin: 0 0.5rem;
+	}
+
+	svg {
+		vertical-align: middle;
+	}
+</style>
+
+<a href="https://www.linkedin.com/in/valentineus/" title="LinkedIn" target="_blank">
+	<svg width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-label="LinkedIn">
+		<path d="M16 8a6 6 0 0 1 6 6v7h-4v-7a2 2 0 0 0-2-2 2 2 0 0 0-2 2v7h-4v-7a6 6 0 0 1 6-6z"></path>
+		<rect x="2" y="9" width="4" height="12"></rect>
+		<circle cx="4" cy="4" r="2"></circle>
+	</svg>
+</a>