Add documentation for #2362

Document the new `set-date` addon action introduced by #2362.

Signed-off-by: martin f. krafft <madduck@madduck.net>

website/site/content/docs/addons/writing.md

@@ -162,8 +162,8 @@ You find the complete structure below. It consists of these parts:
 - `newItems`: declares files relative to `OUTPUT_DIR` that should be
   processed as new uploads
 
-The `commands` allows to set tags, fields and other things. All parts
-are optional, you don't need to return the complete structure. Just
+The `commands` allows to set the item date, tags, fields and other things. All
+parts are optional, you don't need to return the complete structure. Just
 returning `commands` or only `files` is ok.
 
 **Example**

website/src/main/scala/docspell/website/AddonOutputExample.scala

@@ -15,6 +15,7 @@ object AddonOutputExample extends Helper {
       BackendCommand.ItemUpdate(
         itemId = id("XabZ-item-id"),
         actions = List(
+          ItemAction.SetDate(1699632496000),
           ItemAction.AddTags(Set("tag1", "tag2")),
           ItemAction.ReplaceTags(Set("tagX", "tagY")),
           ItemAction.RemoveTags(Set("tag0", "tag9")),