feat(outputs): app-slug and installation-id (#105)

It is convenient to use `https://api.github.com/users/$app_slug[bot]` to
obtain the corresponding account ID later.
Then build `Signed-off-by: $app_slug[bot]
<$id+$app_slug[bot]@users.noreply.github.com>`.

Currently, there is no Linux environment to build test snapshot files

action.yml

@@ -40,6 +40,10 @@ inputs:
 outputs:
   token:
     description: "GitHub installation access token"
+  installation-id:
+    description: "GitHub App installation ID"
+  app-slug:
+    description: "GitHub App slug"
 runs:
   using: "node20"
   main: "dist/main.cjs"