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

Author: andre-stefanov

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

@@ -15,7 +15,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-22.04, macos-26, windows-2022]
+        os: [windows-2022]
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout
@@ -30,10 +30,10 @@ jobs:
           python-version: 3.12
 
       - name: Setup Zephyr project
-        uses: ./OpenAstroFocuser/.github/actions/setup-zephyr
+        uses: zephyrproject-rtos/action-zephyr-setup@v1
         with:
           app-path: OpenAstroFocuser
-          toolchains: arm-zephyr-eabi:xtensa-espressif_esp32s3_zephyr-elf
+          toolchains: arm-zephyr-eabi,xtensa-espressif_esp32s3_zephyr-elf
           ccache-cache-key: ${{ matrix.os }}
 
       - name: Build firmware
@@ -52,4 +52,4 @@ 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