gha - don't stop if Pipefile.lock is modified, but add a warning about it

This is because it should not break the tests suite, but still is something to deal with

Author: cderv

.github/workflows/actions/quarto-dev/action.yml

@@ -42,10 +42,28 @@ runs:
           echo "Unexpected package/dist/share path detected: $(quarto --paths)"
           Exit 1 
         }
-        If ( "$(git status --porcelain)" -ne "" ) {
-          echo "Uncommitted changes detected:"
-          git status --porcelain
-          Exit 1 
+        # check if configure is modifying some files as it should not
+        $modifiedFiles = git diff --name-only
+        If ($modifiedFiles -ne "") {
+
+          # Convert the list to an array
+          $modifiedFilesArray = $modifiedFiles -split "`n" | ForEach-Object { $_.Trim() }
+
+          If ($modifiedFilesArray -contains "tests/Pipfile.lock") {
+            Write-Output "::warning::test/Pipfile.lock has been modified."
+            $modifiedFilesArray = $modifiedFilesArray | Where-Object { $_ -notmatch "Pipfile.lock" }
+          }
+
+          # Count the number of modified files
+          $modifiedFilesCount = $modifiedFilesArray.Count
+
+          If ($modifiedFilesCount -ge 1) {
+            Write-Output "::error::Uncommitted changes detected."
+            foreach ($file in $modifiedFilesArray) {
+              Write-Output $file
+            }
+            Exit 1
+          }
         }
 
     - name: Quarto Check