Implement more functions (#20)

* Send the release title instead of version

& remove the `Release` text

* Ability to use the existing Discord user & avatar

* fix

* Support for adding a footer

* Update index.js

* Update index.js

* Update index.js

* Updated docs

* Support for footer timestamps

* Support for sending normal text above the embed

useful for pings

action.yml

@@ -12,11 +12,21 @@ inputs:
   username:
     description: String username for webhook.
     required: false
-    default: 'Release Changelog'
   avatar_url:
     description: String url to webhook avatar picture.
     required: false
-    default: 'https://cdn.discordapp.com/avatars/487431320314576937/bd64361e4ba6313d561d54e78c9e7171.png'
+  content:
+    description: String content for webhook.
+    required: false
+  footer_title:
+    description: Title for the footer.
+    required: false
+  footer_icon_url:
+    description: Icon url for the footer.
+    required: false
+  footer_timestamp:
+    description: Timestamp for the footer.
+    required: false
 runs:
   using: 'node16'
   main: 'index.js'