adding release workflow

Author: TennisGazelle

.github/workflows/release.yml

@@ -0,0 +1,26 @@
+name: Release
+on:
+  workflow_dispatch: # manually only for now
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v1
+    - name: Zip Contents into Folder
+      run: zip -r release.zip blender/*.blend blender/models/*.obj docs/ scripts/* config.yaml Makefile .gitignore LICENSE README.md
+      
+    - name: Bump version and Push tag
+      id: tag_version
+      uses: mathieudutour/[email protected]
+      with:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Create a GitHub Release
+      uses: actions/create-release@v1
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      with:
+        tag_name: ${{ steps.tag_version.outputs.new_tag }}
+        release_name: Release ${{ steps.tag_version.outputs.new_tag }}
+        body: ${{ steps.tag_version.outputs.changelog }}