Add support to "Check npm" workflow for multiple project npm packages

Previously the workflow design assumed that the project would only consist of a single npm package in the root of the
repository.

A project might contain multiple packages in arbitrary subfolders. This is now supported by specifying the path to each
package in the job matrixes.

.github/workflows/check-npm-task.yml

@@ -50,12 +50,19 @@ jobs:
           echo "result=$RESULT" >> $GITHUB_OUTPUT
 
   validate:
+    name: validate (${{ matrix.package.path }})
     needs: run-determination
     if: needs.run-determination.outputs.result == 'true'
     runs-on: ubuntu-latest
     permissions:
       contents: read
 
+    strategy:
+      fail-fast: false
+      matrix:
+        package:
+          - path: .
+
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -77,15 +84,24 @@ jobs:
               github.com/go-task/task/v3/cmd/task
 
       - name: Validate package.json
+        env:
+          NPM_PACKAGE_PATH: ${{ matrix.package.path }}
         run: task --silent npm:validate
 
   check-sync:
+    name: check-sync (${{ matrix.package.path }})
     needs: run-determination
     if: needs.run-determination.outputs.result == 'true'
     runs-on: ubuntu-latest
     permissions:
       contents: read
 
+    strategy:
+      fail-fast: false
+      matrix:
+        package:
+          - path: .
+
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -107,6 +123,8 @@ jobs:
               github.com/go-task/task/v3/cmd/task
 
       - name: Install npm dependencies
+        env:
+          NPM_PACKAGE_PATH: ${{ matrix.package.path }}
         run: task npm:install-deps
 
       - name: Check package-lock.json

Taskfile.yml

@@ -325,6 +325,7 @@ tasks:
   # Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/npm-task/Taskfile.yml
   npm:install-deps:
     desc: Install dependencies managed by npm
+    dir: "{{default .DEFAULT_NPM_PACKAGE_PATH .NPM_PACKAGE_PATH}}"
     cmds:
       - npm install