feat: enhance blog post and page schema with new properties

- Added optional `basedOn` field to blog post schema for better content attribution.
- Updated blog post markdown to include `basedOn` reference for improved context.
- Refactored page schema to replace deprecated website schema, enhancing structured data representation.
- Adjusted 404 and index pages to utilize the new page schema for consistency and SEO improvements.

src/utils/schemas/websiteSchema.ts

@@ -1,15 +0,0 @@
-import type { WithContext, WebSite } from "schema-dts";
-
-export type WebsiteSchemaParams = {
-	readonly description: string;
-	readonly siteUrl: string;
-	readonly title: string;
-};
-
-export default ({ siteUrl, title, description }: WebsiteSchemaParams): WithContext<WebSite> => ({
-	"@context": "https://schema.org",
-	"@type": "WebSite",
-	"url": new URL("/", siteUrl).toString(),
-	"name": title,
-	"description": description,
-});