Expand ci to esp32

Now also compiles for the ESP32C3 and ESP32S2

.github/workflows/compile_sketch.yml

@@ -0,0 +1,37 @@
+name: Compile Sketch
+
+on:
+  - push
+  - pull_request
+
+jobs:
+  build:
+    name: ${{ matrix.board.fqbn }}
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        board:
+          - fqbn: "ATTinyCore:avr:attinyx5micr"
+          - fqbn: "esp32:esp32:adafruit_qtpy_esp32s2"
+          - fqbn: "esp32:esp32:XIAO_ESP32C3"
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Compile 
+        uses: arduino/compile-sketches@main
+        with:
+          platforms: |
+            - name: "ATTinyCore:avr"
+              source-url: "https://github.com/SpenceKonde/ATTinyCore/archive/1.5.2.zip"
+              source-path: "./avr/"
+            - name: "arduino:avr"
+            - name: esp32:esp32
+              source-url: https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json
+          sketch-paths: |
+            - ./
+          fqbn: ${{ matrix.board.fqbn }}
+          libraries: |
+            - name: "Adafruit NeoPixel"