Group action setup log output

The setup of the action produces a significant amount of output, which is printed in the worflow run logs. This output
is not of interest to the user so long as the action itself is working correctly so it is only noise in their logs.

A log group was previously used to collapse all that setup output in the logs. This was inadvertently removed during
recent development work. It is hereby restored.

Author: per1234

action.yml

@@ -54,31 +54,30 @@ runs:
       id: system-user-site-packages
       shell: bash
       run: |
+        # Get system Python "user site-packages" path.
         echo "path=$(python -m site --user-site)" >> $GITHUB_OUTPUT
 
     - name: Install Python
       uses: actions/setup-python@v4.5.0
       with:
         python-version-file: ${{ github.action_path }}/.python-version
 
-    - name: Install Poetry
+    - name: Action setup
       shell: bash
+      working-directory: ${{ github.action_path }}
       run: |
+        echo "::group::Action setup"
+
+        # Install Poetry.
         pipx install \
           --python "$(which python)" \
           poetry==1.4.0
 
-    - name: Install Python Dependencies
-      shell: bash
-      working-directory: ${{ github.action_path }}
-      run: |
+        # Install Python dependencies.
         poetry install \
           --only main,external
 
-    - name: Make user-installed Python packages available to platforms
-      shell: bash
-      working-directory: ${{ github.action_path }}
-      run: |
+        # Make user-installed Python packages available to platforms.
         readonly PYTHON_ENVIRONMENT_PATH="$(
           poetry env info \
             --path
@@ -92,6 +91,9 @@ runs:
           "${{ steps.system-user-site-packages.outputs.path }}" > \
           "${VENV_SITE_PACKAGES_PATH}/system-user-site-packages.pth"
 
+        # Terminate action setup group
+        echo "::endgroup::"
+
     - name: Run script
       shell: bash
       env:
@@ -108,5 +110,6 @@ runs:
         INPUT_SKETCHES-REPORT-PATH: ${{ inputs.sketches-report-path }}
       working-directory: ${{ github.action_path }}
       run: |
+        # Run action
         poetry run \
           python compilesketches/compilesketches.py