[content] migrate 404 to statics

[pagex] snake case to camel case
[voidcannon] implement Static content type

src/content/editorial/404/404.pagex.js

@@ -1,22 +0,0 @@
-import {
-    VoidcannonContentType,
-    VoidcannonSectionType
-} from "voidcannon";
-
-import NotFoundFragment from "voidcannon/src/fragments/notfound/NotFound.fragment.js";
-
-export default {
-    type: VoidcannonContentType.EDITORIAL,
-    id: "voidcannon-404",
-    slug: "404",
-    name: "404",
-    description: "404. Not found.",
-    color: null,
-    sections: [
-        {
-            type: VoidcannonSectionType.FRAGMENT,
-            fragment: NotFoundFragment,
-            params: {}
-        }
-    ]
-}

src/content/static/404/404.pagex.js

@@ -0,0 +1,18 @@
+import {
+    VoidcannonContentType
+} from "voidcannon";
+
+import NotFoundFragment from "voidcannon/src/fragments/notfound/NotFound.fragment.js";
+
+export default {
+    type: VoidcannonContentType.STATIC,
+    id: "voidcannon-404",
+    slug: "404",
+    name: "404",
+    description: "404. Not found.",
+    color: null,
+    static: {
+        fragment: NotFoundFragment,
+        params: {}
+    }
+}