Support for workflow summary (#89)

* Add summary_mode

* Token is not necessary for workflow summary

* Add summary_mode in action.ts

* Update description for comment-type field

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Co-authored-by: thsaravana <th.saravana@gmail.com>

action.yml

@@ -23,7 +23,7 @@ inputs:
     required: false
     default: 'false'
   comment-type:
-    description: 'Specifies where to add the comment: as a PR comment, workflow summary, or both.'
+    description: 'Specifies where to add the comment, whether as a PR comment, workflow summary, or both.'
     required: false
     default: 'pr_comment'
     options: