feat: add options for branch, local_backend, and publish_mode (editorial flow)

Example for a YAML config:

```
  cms:
    branch: main
    local_backend: true
    publish_mode:
 ```

Close #2124

test/config.yaml

@@ -2,6 +2,7 @@ title: Wowchemy Test
 baseurl:
 module:
   imports:
+    - path: github.com/wowchemy/wowchemy-hugo-modules/wowchemy-cms
     - path: github.com/wowchemy/wowchemy-hugo-modules/wowchemy
 outputs:
   home: [HTML, RSS, JSON, WebAppManifest, headers, redirects]
@@ -14,11 +15,6 @@ params:
   font: native
   main_menu:
     enable: false
-  search:
-    engine: 0
-  security:
-    csp:
-      policy:
-      report_only: false
   cms:
-    branch: master
+    local_backend: true
+    publish_mode: