add media library

* rebase editorial workflow pull requests when behind

* fix async/await transpilation

* add media library pagination

* switch media library to grid layout

* ensure that only cms branches can be force updated

src/backends/backend.js

@@ -148,6 +148,10 @@ class Backend {
     );
   }
 
+  getMedia() {
+    return this.implementation.getMedia();
+  }
+
   entryWithFormat(collectionOrEntity) {
     return (entry) => {
       const format = resolveFormat(collectionOrEntity, entry);
@@ -244,6 +248,13 @@ class Backend {
     });
   }
 
+  persistMedia(file) {
+    const options = {
+      commitMessage: `Upload ${file.path}`,
+    };
+    return this.implementation.persistMedia(file, options);
+  }
+
   deleteEntry(config, collection, slug) {
     const path = selectEntryPath(collection, slug);
 
@@ -255,6 +266,11 @@ class Backend {
     return this.implementation.deleteFile(path, commitMessage);
   }
 
+  deleteMedia(path) {
+    const commitMessage = `Delete ${path}`;
+    return this.implementation.deleteFile(path, commitMessage);
+  }
+
   persistUnpublishedEntry(config, collection, entryDraft, MediaFiles) {
     return this.persistEntry(config, collection, entryDraft, MediaFiles, { unpublished: true });
   }