Add path filter to pr-line-counter workflow (#184)

* Initial plan

* Add path filter to pr-line-counter workflow for utils/matrix-logic

Co-authored-by: functionstackx <47992694+functionstackx@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: functionstackx <47992694+functionstackx@users.noreply.github.com>

Author: Copilot

.github/workflows/pr-line-counter.yml

@@ -3,6 +3,8 @@ name: PR Line Counter
 on:
   pull_request:
     types: [opened, synchronize, reopened, ready_for_review]
+    paths:
+      - 'utils/matrix-logic/**'
 
 jobs:
   count-lines: