Add workflow for CI

Author: giulcioffi

.github/workflows/compile-examples.yml

@@ -0,0 +1,67 @@
+name: Compile Examples
+
+on: [pull_request, push]
+
+jobs:
+  compile-test:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        fqbn: [
+          "arduino:megaavr:uno2018" #,
+          #"arduino:megaavr:nona4809"
+        ]
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      # The source files are in a subfolder of the ArduinoCore-API repository, so it's not possible to clone it directly to the final destination in the core
+      - name: Checkout ArduinoCore-API
+        uses: actions/checkout@v2
+        with:
+          repository: arduino/ArduinoCore-API
+          path: extras/ArduinoCore-API
+
+      - name: Install ArduinoCore-API
+        run: mv "$GITHUB_WORKSPACE/extras/ArduinoCore-API/api" "$GITHUB_WORKSPACE/cores/arduino"
+
+      - name: Checkout Adafruit WiFiNINA
+        uses: actions/checkout@v2
+        with:
+          repository: adafruit/WiFiNINA
+          path: libraries/WiFiNINA      
+
+      - name: Compile examples
+        uses: arduino/actions/libraries/compile-examples@master
+        with:
+          fqbn: ${{ matrix.fqbn }}
+          libraries: |
+            - name: Adafruit IO Arduino
+              version: 3.6.0
+            - name: Adafruit MQTT Library
+              version: 1.0.3
+            - name: ArduinoHttpClient
+              version: 0.4.0
+            # Don't use library manager WiFiNINA
+            #  - name: WiFiNINA
+            #  version: 1.4.0
+            - name: MegunoLink
+          platforms: |
+            # Use Board Manager to install the latest release of Arduino megaAVR Boards to get the toolchain
+            - name: "arduino:megaavr"
+            # Overwrite the Board Manager installation with the local platform
+            - source-path: "./"
+              name: "arduino:megaavr"
+          sketch-paths: "extras/AIO_LED_Pot"
+          size-report-sketch: 'AIO_LED_Pot'
+          enable-size-deltas-report: 'true'
+          verbose: 'true'
+
+      - name: Save memory usage change report as artifact
+        if: github.event_name == 'pull_request'
+        uses: actions/upload-artifact@v1
+        with:
+          name: 'size-deltas-reports'
+          path: 'size-deltas-reports'

.github/workflows/report-size-deltas.yml

@@ -0,0 +1,13 @@
+name: Report PR Size Deltas
+
+on:
+  schedule:
+    - cron:  '*/5 * * * *'
+
+jobs:
+  report:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Comment size deltas reports to PRs
+        uses: arduino/actions/libraries/report-size-deltas@master