Staged publishing support

publish/action.yml

@@ -11,6 +11,12 @@ inputs:
   script:
     description: "The command to use to publish packages"
     required: false
+  stage:
+    description: >
+      Whether to use staged publishing. Omit to use the Changesets config,
+      set to true for --stage, or false for --no-stage. Cannot be combined
+      with a custom script.
+    required: false
   pack-dir-artifact-id:
     description: "Artifact id for packed publish output generated by the pack subaction"
     required: false
@@ -30,6 +36,8 @@ outputs:
   published-packages:
     description: >
       A JSON array to present the published packages. The format is `[{"name": "@xx/xx", "version": "1.2.0"}, {"name": "@xx/xy", "version": "0.8.9"}]`
+  staged-release-artifact-id:
+    description: "Artifact id for the staged release handoff"
 branding:
   icon: package
   color: blue