chore: create VSIX in github workflow

.github/workflows/upload-artifact.yaml

@@ -0,0 +1,32 @@
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - main    
+
+name: Upload VSIX
+jobs:
+  upload-vsix:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9 # v3.5.3
+        with:
+          fetch-depth: 0
+      - name: Install Node.js
+        uses: actions/setup-node@e33196f7422957bea03ed53f6fbb155025ffc7b8 # 3.7.0
+        with:
+          node-version: 20.x
+          registry-url: 'https://registry.npmjs.org'
+          scope: '@openfga'
+          always-auth: false
+          cache: 'npm'
+          cache-dependency-path: ./package-lock.json
+      - run: npm ci
+      - run: npm install @vscode/vsce
+      - run: npx vsce package -o openfga-latest.vsix
+      - uses: actions/upload-artifact@0b7f8abb1508181956e8e162db84b466c27e18ce # 3.1.2
+        with:
+          name: openfga-latest.vsix
+          path: ./openfga-latest.vsix
+          if-no-files-found: error