Update build workflow to use official Zephyr setup action and restrict OS matrix to Windows

Author: andre-stefanov

.github/actions/setup-zephyr/action.yml

@@ -11,30 +11,29 @@ permissions:
 
 jobs:
   build:
-    name: Build app and tests
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-22.04, macos-26, windows-2022]
+        os: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.os }}
+
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
+      # Checkout into "app" so app-path can be stable everywhere
+      - uses: actions/checkout@v4
         with:
           path: OpenAstroFocuser
-          persist-credentials: false
 
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
           python-version: 3.12
 
-      - name: Setup Zephyr project
-        uses: ./OpenAstroFocuser/.github/actions/setup-zephyr
+      # Setup Zephyr
+      - name: Setup Zephyr
+        uses: zephyrproject-rtos/action-zephyr-setup
         with:
-          app-path: OpenAstroFocuser
-          toolchains: arm-zephyr-eabi:xtensa-espressif_esp32s3_zephyr-elf
-          ccache-cache-key: ${{ matrix.os }}
+          app-path: 'OpenAstroFocuser'
+          toolchains: 'xtensa-espressif_esp32s3_zephyr-elf'
 
       - name: Build firmware
         working-directory: OpenAstroFocuser
@@ -52,4 +51,4 @@ jobs:
           if [ "${{ runner.os }}" = "Windows" ]; then
             EXTRA_TWISTER_FLAGS="--short-build-path -O/tmp/twister-out"
           fi
-          west twister -T tests -v --inline-logs --integration $EXTRA_TWISTER_FLAGS
+          west twister -T tests -v --inline-logs --integration $EXTRA_TWISTER_FLAGS