Add "Playing It Safe" draft and improve type-checking

- Remove most type assertions and improve types
- Validate wordCount property
- Add "Vore Day" tag
- Add licenses

src/pages/games/[...slug].astro

@@ -18,6 +18,17 @@ export const getStaticPaths: GetStaticPaths = async () => {
 };
 
 const game = Astro.props;
+if (!game.data.isDraft) {
+  if (!game.data.pubDate) {
+    throw new Error(`Missing "pubDate" for published game ${game.data.title} ("${game.slug}")`);
+  }
+  if (!game.data.thumbnail) {
+    throw new Error(`Missing "thumbnail" for published game ${game.data.title} ("${game.slug}")`);
+  }
+  if (game.data.tags.length == 0) {
+    throw new Error(`Missing "tags" for published game ${game.data.title} ("${game.slug}")`);
+  }
+}
 const { Content } = await game.render();
 ---