Add paths-filter action

https://github.com/dorny/paths-filter

Author: dorny

README.md

@@ -221,6 +221,7 @@ Set up your GitHub Actions workflow with a specific version of your programming
 - [Delete Run Artifacts](https://github.com/marketplace/actions/delete-run-artifacts) - Deletes all artifacts at the end of a workflow run.
 - [GitHub Environment Variables Action](https://github.com/FranzDiebold/github-env-vars-action) - Expose environment variables such as the branch/tag name, repository slug, and ref slug.
 - [GitHub Action Locks](https://github.com/abatilo/github-action-locks/blob/master/README.md) - Guarantee atomic execution of your GitHub Action workflows.
+- [Paths Filter](https://github.com/dorny/paths-filter) - Conditionally run actions based on files modified by PR, feature branch or pushed commits.
 
 #### Environments