add package action (#1)

Author: ateoi

.github/workflows/package.yml

@@ -0,0 +1,8 @@
+name: Package
+on:
+  push:
+    branches:
+      - 'main'
+jobs:
+  package:
+    uses: ./.github/workflows/reusable-package.yml

.github/workflows/reusable-package.yml

@@ -0,0 +1,16 @@
+name: Reusable package
+on:
+  workflow_call:
+jobs:
+  package:
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Build package
+        shell: pwsh
+        run: ./Build-Installer.ps1
+      - uses: actions/upload-artifact@v3
+        with:
+          name: build
+          path: JetBrainsMonoNF/bin/Release/*.msi
+          if-no-files-found: error