Static CMS v2.0 (#226)

- [x] Update auf Static CMS v2.0
- [x] aktualisierte Shortcodes (schließt #225)
- [x] aktualisierte Previews (schließt #181)
- Ordnerunterstützung
- [x] vervollständigte Seiten
- [x] Aufräumarbeiten

Reviewed-on: https://git.cantorgymnasium.de/gcg/gcg-website/pulls/226

static/admin/previews/page-previews/index.js

@@ -0,0 +1,40 @@
+import AboutPreview from "./about-preview.js";
+import BlogPreview from "./blog-preview.js";
+import ContestPreview from "./contest-preview.js";
+import GanztagPreview from "./ganztag-preview.js";
+import PagePreview from "./page-preview.js";
+import EventPreview from "./event-preview.js";
+import AnmeldungPreview from "./anmeldung-preview.js";
+import HeaderPreview from "./header-preview.js";
+import ChronikPreview from "./chronik-preview.js";
+import KontaktPreview from "./kontakt-preview.js";
+import AnmeldeformularPreview from "./anmeldeformular-preview.js";
+import ChronikIndexPreview from "./chronik-index-preview.js";
+import AuthorPreview from "./author-preview.js";
+import FormsPreview from "./forms-preview.js";
+import CantorpreisPreview from "./cantorpreis-preview.js";
+import ProjektwochePreview from "./projektwoche-preview.js";
+import AbiturientenPreview from "./abiturienten-preview.js";
+
+import PreviewStyles from "./styles.js";
+
+export {
+	AboutPreview,
+	BlogPreview,
+	ContestPreview,
+	GanztagPreview,
+	PagePreview,
+	EventPreview,
+	AnmeldungPreview,
+	HeaderPreview,
+	ChronikPreview,
+	KontaktPreview,
+	AnmeldeformularPreview,
+	ChronikIndexPreview,
+	AuthorPreview,
+	FormsPreview,
+	CantorpreisPreview,
+	ProjektwochePreview,
+	AbiturientenPreview,
+	PreviewStyles,
+};