feat: add Discord notification workflow for new pull requests

.github/workflows/notification.yaml

@@ -0,0 +1,18 @@
+name: Discord Pull Request Notification
+
+on:
+  pull_request:
+    types: [opened, reopened]
+
+jobs:
+  notify: 
+  runs-on: ubuntu-latest
+  steps:
+    uses: joelwmale/webhook-action@master
+    with:
+      webhook_url: ${{ secrets.DISCORD_WEBHOOK_URL }}
+      body: > 
+      { 
+        "content": "New Pull Request: ${{ github.event.pull_request.title }}\nBy: ${{ github.event.pull_request.login}}\n\n${{ github.event.pull_request.html_url}}",
+        "avatar_url": "https://avatars.githubusercontent.com/u/193271640"
+      }