Several minor improvements to typing and misc.

- Improved schema validation
- Move username parsing and other validators to schema types
- Fix astro check command
- Add JSON/YAML schema validation for data collections
- Update licenses
- Remove deployment script in favor of rsync
- Prevent unsanitized input in export-story script
- Change "eng" language to "en", per BCP47
- Clean up i18n keys and add aria attributes
- Improve MastodonComments behavior on no-JS browsers

src/components/UserComponent.astro

@@ -1,6 +1,6 @@
 ---
-import { type CollectionEntry } from "astro:content";
-import { type Lang } from "../content/config";
+import type { CollectionEntry } from "astro:content";
+import type { Lang } from "../content/config";
 import { getUsernameForLang } from "../utils/get_username_for_lang";
 
 type Props = {
@@ -12,12 +12,7 @@ let { user, lang } = Astro.props;
 const username = getUsernameForLang(user, lang);
 let link: string | null = null;
 if (user.data.preferredLink) {
-  const preferredLink = user.data.links[user.data.preferredLink]!;
-  if (typeof preferredLink === "string") {
-    link = preferredLink;
-  } else {
-    link = preferredLink[0];
-  }
+  link = user.data.links[user.data.preferredLink]!.link;
 }
 ---