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/JsonLd.astro

@@ -0,0 +1,12 @@
+---
+import type { WithContext, Thing } from "schema-dts";
+
+type Props = {
+	readonly schema: WithContext<Thing>;
+};
+
+const { schema } = Astro.props;
+const json = JSON.stringify(schema);
+---
+
+<script is:inline type="application/ld+json" set:html={json} />