add a compile test for checkins

Author: DIBJT

.github/workflows/compile-sketch.yml

@@ -0,0 +1,56 @@
+name: Cross-compilation test
+
+on:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+
+
+jobs:
+  compile-sketch:
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+
+      matrix:
+        board:
+            # RP2350
+          # https://github.com/arduino/ArduinoCore-mbed/blob/master/boards.txt
+          - fqbn: rp2040:rp2040:sparkfun_iotredboard_rp2350
+          #     platforms: |
+            name: rp2040:rp2040
+            source-url: https://github.com/earlephilhower/arduino-pico/releases/download/global/package_rp2040_index.json
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        
+      - name: Branch name
+        run: echo running on branch ${GITHUB_REF##*/}
+
+            # Setup Arduino command line - install esp32 and all the libs flux needs
+      - name: Arduino - Install and setup the Arduino CLI
+        uses: arduino/setup-arduino-cli@v2
+
+      - name: Arduino - Start config file
+        run: arduino-cli config init --additional-urls ${{ matrix.board.source-url}}
+
+      - name: Arduino - Update index
+        run: arduino-cli core update-index
+
+      - name: Arduino - Install platform
+        run: arduino-cli core install ${{ matrix.board.name}}
+
+      - name: Arduino - Install libraries
+        run: |
+            arduino-cli config set library.enable_unsafe_install true
+            arduino-cli version
+            arduino-cli lib install 'PicoDVI - Adafruit Fork'
+
+      - name: Compile Sketch
+        run: arduino-cli compile --fqbn ${{ matrix.board.fqbn }} examples/1bit_double_buffer --library .
+        
+    
+