Adds vsix-build workflow

.github/workflows/create-vsix.yaml

@@ -0,0 +1,29 @@
+on:
+  push:
+    tags:
+      - "*"
+
+name: Deploy Extension
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
+      - run: npm ci
+      - name: Create package
+        uses: HaaLeo/publish-vscode-extension@v1
+        with:
+          dryRun: true
+          pat: https://stub.value
+      - name: Create release
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          tag: ${{ github.ref_name }}
+        run: |
+          gh release create "$tag" \
+              --repo="$GITHUB_REPOSITORY" \
+              --title="${tag#v}" \
+              --generate-notes