Feat: entry sorting (#3494)

* refactor: typescript search actions, add tests avoid duplicate search

* refactor: switch from promise chain to async/await in loadEntries

* feat: add sorting, initial commit

* fix: set isFetching to true on entries request

* fix: ui improvments and bug fixes

* test: fix tests

* feat(backend-gitlab): cache local tree)

* fix: fix prop type warning

* refactor: code cleanup

* feat(backend-bitbucket): add local tree caching support

* feat: swtich to orderBy and support multiple sort keys

* fix: backoff function

* fix: improve backoff

* feat: infer sortable fields

* feat: fetch file commit metadata - initial commit

* feat: extract file author and date, finalize GitLab & Bitbucket

* refactor: code cleanup

* feat: handle github rate limit errors

* refactor: code cleanup

* fix(github): add missing author and date when traversing cursor

* fix: add missing author and date when traversing cursor

* refactor: code cleanup

* refactor: code cleanup

* refactor: code cleanup

* test: fix tests

* fix: rebuild local tree when head doesn't exist in remote branch

* fix: allow sortable fields to be an empty array

* fix: allow translation of built in sort fields

* build: fix proxy server build

* fix: hide commit author and date fields by default on non git backends

* fix(algolia): add listAllEntries method for alogolia integration

* fix: handle sort fields overflow

* test(bitbucket): re-record some bitbucket e2e tests

* test(bitbucket): fix media library test

* refactor(gitgateway-gitlab): share request code and handle 404 errors

* fix: always show commit date by default

* docs: add sortableFields

* refactor: code cleanup

* improvement: drop multi-sort, rework sort UI

* chore: force main package bumps

Co-authored-by: Shawn Erquhart <shawn@erquh.art>

packages/netlify-cms-locales/src/en/index.js

@@ -37,13 +37,25 @@ const en = {
       searchAll: 'Search all',
     },
     collectionTop: {
+      sortBy: 'Sort by',
       viewAs: 'View as',
       newButton: 'New %{collectionLabel}',
+      ascending: 'Ascending',
+      descending: 'Descending',
     },
     entries: {
-      loadingEntries: 'Loading Entries',
-      cachingEntries: 'Caching Entries',
+      loadingEntries: 'Loading Entries...',
+      cachingEntries: 'Caching Entries...',
       longerLoading: 'This might take several minutes',
+      noEntries: 'No Entries',
+    },
+    defaultFields: {
+      author: {
+        label: 'Author',
+      },
+      updatedOn: {
+        label: 'Updated On',
+      },
     },
   },
   editor: {