Discord Threads for 'help wanted' issues (#2960)

* Added discuss_on_discord extension

* Added workflow to create threads for help wanted issues on discord

* Update .github/workflows/discord_issues.yml

Co-authored-by: vfdev <vfdev.5@gmail.com>

---------

Co-authored-by: vfdev <vfdev.5@gmail.com>

.github/workflows/discord_issues.yml

@@ -0,0 +1,25 @@
+on:
+  issues:
+    types:
+      - labeled
+  workflow_dispatch:
+    inputs:
+      issue_number:
+        description: 'Issue number'
+        required: true
+
+permissions:
+  issues: write
+
+jobs:
+  discord:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Discuss on Discord
+        uses: EndBug/discuss-on-discord@v1.1.0
+        if: ${{ github.event.label.name == 'help wanted' }}
+        with:
+            discord_bot_token: ${{ secrets.DISCORD_BOT_TOKEN }}
+            destination: ${{ secrets.DISCORD_BOT_DESTINATION }}
+            issue_number: ${{ github.event.inputs.issue_number || github.event.issue.number }}
+            issue_comment: Hey 👋, I've just created a [thread]($THREAD_LINK$) for this issue on [PyTorch-Ignite Discord](https://pytorch-ignite.ai/chat) where you can quickly talk to the community on the topic.