[blog] /src/content/ -> /content/

[voidcannon] hydrate/nojs fixes
[pagex] fix html parser quirk

content/authors/placeholder.pagex.js

@@ -0,0 +1,7 @@
+import {VoidcannonContentType} from "voidcannon";
+
+export default {
+    type: VoidcannonContentType.AUTHOR,
+    id: "placeholder",
+    name: "Placeholder Author",
+}