Add support to "Check License" for checking license files in multiple paths

.github/workflows/check-license.yml

@@ -1,11 +1,6 @@
 # Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/check-license.md
 name: Check License
 
-env:
-  EXPECTED_LICENSE_FILENAME: LICENSE.txt
-  # SPDX identifier: https://spdx.org/licenses/
-  EXPECTED_LICENSE_TYPE: GPL-3.0
-
 # See: https://docs.github.com/actions/writing-workflows/choosing-when-your-workflow-runs/events-that-trigger-workflows
 on:
   create:
@@ -58,12 +53,23 @@ jobs:
           echo "result=$RESULT" >> $GITHUB_OUTPUT
 
   check-license:
+    name: ${{ matrix.check-license.path }}
     needs: run-determination
     if: needs.run-determination.outputs.result == 'true'
     runs-on: ubuntu-latest
     permissions:
       contents: read
 
+    strategy:
+      fail-fast: false
+
+      matrix:
+        check-license:
+          - path: ./
+            expected-filename: LICENSE.txt
+            # SPDX identifier: https://spdx.org/licenses/
+            expected-type: GPL-3.0
+
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -76,23 +82,27 @@ jobs:
       - name: Install licensee
         run: gem install licensee
 
-      - name: Check license file
+      - name: Check license file for ${{ matrix.check-license.path }}
         run: |
           EXIT_STATUS=0
+
+          # Go into folder path
+          cd ./${{ matrix.check-license.path }}
+
           # See: https://github.com/licensee/licensee
           LICENSEE_OUTPUT="$(licensee detect --json --confidence=100)"
 
           DETECTED_LICENSE_FILE="$(echo "$LICENSEE_OUTPUT" | jq .matched_files[0].filename | tr --delete '\r')"
           echo "Detected license file: $DETECTED_LICENSE_FILE"
-          if [ "$DETECTED_LICENSE_FILE" != "\"${EXPECTED_LICENSE_FILENAME}\"" ]; then
-            echo "::error file=${DETECTED_LICENSE_FILE}::detected license file $DETECTED_LICENSE_FILE doesn't match expected: $EXPECTED_LICENSE_FILENAME"
+          if [ "$DETECTED_LICENSE_FILE" != "\"${{ matrix.check-license.expected-filename }}\"" ]; then
+            echo "::error file=${DETECTED_LICENSE_FILE}::detected license file $DETECTED_LICENSE_FILE doesn't match expected: ${{ matrix.check-license.expected-filename }}"
             EXIT_STATUS=1
           fi
 
           DETECTED_LICENSE_TYPE="$(echo "$LICENSEE_OUTPUT" | jq .matched_files[0].matched_license | tr --delete '\r')"
           echo "Detected license type: $DETECTED_LICENSE_TYPE"
-          if [ "$DETECTED_LICENSE_TYPE" != "\"${EXPECTED_LICENSE_TYPE}\"" ]; then
-            echo "::error file=${DETECTED_LICENSE_FILE}::detected license type $DETECTED_LICENSE_TYPE doesn't match expected \"${EXPECTED_LICENSE_TYPE}\""
+          if [ "$DETECTED_LICENSE_TYPE" != "\"${{ matrix.check-license.expected-type }}\"" ]; then
+            echo "::error file=${DETECTED_LICENSE_FILE}::detected license type $DETECTED_LICENSE_TYPE doesn't match expected \"${{ matrix.check-license.expected-type }}\""
             EXIT_STATUS=1
           fi