feat: add RSS feed generation and update package metadata

- Implemented a new RSS feed generation feature in src/pages/feed.xml.ts, allowing users to follow blog updates.
- Updated package.json and package-lock.json to include license information and new type definitions for markdown-it and sanitize-html.
- Refactored createOgImage function to return Uint8Array instead of Buffer for better compatibility.
- Simplified pageSchema by removing the optional mainEntityId parameter for cleaner schema generation.

src/utils/createOgImage.ts

@@ -5,7 +5,7 @@ import { Resvg } from "@resvg/resvg-js";
 import dayjs from "dayjs";
 import satori from "satori";
 
-export async function createOgImage(title: string, datePublished: Date): Promise<Buffer> {
+export async function createOgImage(title: string, datePublished: Date): Promise<Uint8Array> {
 	const formattedDate = dayjs(datePublished).format("MMMM DD, YYYY");
 
 	const markup = await satori(

src/utils/schemas/pageSchema.ts

@@ -4,14 +4,13 @@ import { personId, websiteId } from "./ids";
 export type WebsiteSchemaParams = {
 	readonly description: string;
 	readonly lang: string;
-	readonly mainEntityId?: string;
 	readonly page: string;
 	readonly siteUrl: string;
 	readonly title: string;
 	readonly type?: "WebPage" | "ProfilePage";
 };
 
-export default ({ siteUrl, page, title, description, lang, type = "WebPage", mainEntityId }: WebsiteSchemaParams): WebPage | ProfilePage => {
+export default ({ siteUrl, page, title, description, lang, type = "WebPage" }: WebsiteSchemaParams): WebPage | ProfilePage => {
 	const url = new URL(page, siteUrl).toString();
 
 	const base = {
@@ -28,7 +27,7 @@ export default ({ siteUrl, page, title, description, lang, type = "WebPage", mai
 		return {
 			...base,
 			"@type": "ProfilePage",
-			"mainEntity": { "@id": mainEntityId ?? personId(siteUrl) },
+			"mainEntity": { "@id": personId(siteUrl) },
 		};
 	}