Migrate more code to typescript

src/types.ts

@@ -0,0 +1,37 @@
+export interface Post {
+	id: string;
+	slug: string;
+
+	publishDate: Date;
+	title: string;
+	description?: string;
+
+	image?: string;
+
+	canonical?: string | URL;
+	permalink?: string;
+
+	draft?: boolean;
+
+	excerpt?: string;
+	category?: string;
+	tags?: Array<string>;
+	authors?: Array<string>;
+
+	Content: unknown;
+	content?: string;
+	readingTime: number;
+}
+
+export interface MetaSEO {
+  title?: string,
+	description?: string,
+	image?: string,
+
+	canonical?: string,
+	noindex?: boolean,
+	nofollow?: boolean,
+
+	ogTitle?: string,
+	ogType?: string,
+}