Merge pull request #207 from mkinney/create_build_windows_action

add a build windows action

.github/workflows/build_windows.yml

@@ -0,0 +1,26 @@
+name: Build and publish Windows .exe
+
+on: workflow_dispatch
+
+jobs:
+  build-and-publish:
+    runs-on: windows-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Set up Python 3.9
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.9
+
+      - name: Build exe
+        run: |
+          pip install pyinstaller
+          pip install -r requirements.txt
+          pyinstaller -F -n meshtastic meshtastic/__main__.py
+      - uses: actions/upload-artifact@v2
+        with:
+          name: meshtastic
+          path: dist