Merge #213: feat(blog): add sources of public domain torrents post

2c0dcff fix: add noopener to all target=_blank links (Jose Celano)
1170399 feat(blog): add sources of public domain torrents post with awesome-legal-torrent-sources repo (Jose Celano)

Pull request description:

  ## Summary

  Adds a new blog post curating sources of legal, public-domain, and openly-licensed torrents.

  Also creates the companion repository [torrust/awesome-legal-torrent-sources](https://github.com/torrust/awesome-legal-torrent-sources) as a community-maintained canonical list that the blog post links to.

  ## Changes

  - New blog post `sources-of-public-domain-torrents` with curated list of legal torrent sources
  - New companion repo `torrust/awesome-legal-torrent-sources` for community-maintained updates
  - Cover image for the post
  - Metadata and blog listing updated

  ## Related issue

  Closes #114

ACKs for top commit:
  josecelano:
    ACK 2c0dcff

Tree-SHA512: 4198cbcbcfe1c57241b5fdbf86d1bf3b464af40954453f66ba8c1af814f2f62bb1ec91150ad2e1527c0b49936e1c419f71b6fb9a9af24774d0a34b806f8d4f9a

Author: josecelano

src/routes/blog/sources-of-public-domain-torrents/+page.server.ts

@@ -0,0 +1,14 @@
+import { getMetadata } from '$lib/data/metadata';
+import type { PageServerLoad } from './$types';
+
+export const load: PageServerLoad = async ({ url }) => {
+	const slug = url.pathname.split('/').filter(Boolean).pop();
+	if (!slug) throw new Error('Slug could not be determined.');
+
+	const metadata = await getMetadata();
+	const currentPost = metadata.find((post) => post.slug === slug);
+
+	if (!currentPost) throw new Error(`Post not found: ${slug}`);
+
+	return { currentPost, allPosts: metadata };
+};