add report deltas for compiled sketches

Author: umbynos

.github/workflows/compile-examples.yml

@@ -77,3 +77,11 @@ jobs:
               name: "arduino-beta:mbed"
           sketch-paths: "${{ env.UNIVERSAL_SKETCH_PATHS }} ${{ matrix.additional-sketch-paths }}"
           verbose: 'false'
+          enable-size-deltas-report: 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 +1,11 @@
+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