Add Discord release updates automation (#1346)

adding Discord release updates automation

.github/workflows/announce_release.yml

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+name: Announce Release
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  announce_release:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check out code
+      uses: actions/checkout@v2
+
+    - name: Set up Python
+      uses: actions/setup-python@v2
+      with:
+        python-version: '3.x'
+
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install requests
+
+    - name: Announce Release
+      env:
+        DISCORD_WEBHOOK_URL: ${{ secrets.DISCORD_WEBHOOK_URL }}
+        RELEASE_VERSION: ${{ github.event.release.tag_name }}
+        RELEASE_BODY: ${{ github.event.release.body}}
+      run: python public/announce_release.py

public/announce_release.py

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+import requests
+import os
+
+webhook_url = os.getenv('DISCORD_WEBHOOK_URL')
+release_version = os.getenv('RELEASE_VERSION')
+release_body = os.getenv('RELEASE_BODY')
+
+# message to send to Discord
+data = {
+    "content": 
+        f'''
+        **{release_version}** is now available! Check out the latest features and improvements here: https://zoo.dev/modeling-app/download
+        {release_body}
+        ''',
+    "username": "Modeling App Release Updates",
+    "avatar_url": "https://raw.githubusercontent.com/KittyCAD/modeling-app/main/public/discord-avatar.png"
+}
+
+# POST request to the Discord webhook
+response = requests.post(webhook_url, json=data)
+
+# Check for success
+if response.status_code == 204:
+    print("Successfully sent the message to Discord.")
+else:
+    print("Failed to send the message to Discord.")