PDP-536: Adding copyright check

[SameeraPriyathamTadikonda]

No description provided.

[Copilot]

Pull Request Overview

This PR adds copyright header validation to the GitHub Actions workflow by integrating a reusable workflow from marklogic/pr-workflows and configuring file exclusions for the copyright check.

• Updates workflow name from "🏷️ JIRA ID Validator" to "PR Workflow"
• Adds copyright validation job that uses external workflow for checking copyright headers
• Creates configuration file to exclude build files, docs, and GitHub workflow files from copyright checks

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
.github/workflows/pr-workflow.yaml	Adds copyright validation job and updates workflow name
.copyrightconfig	Defines copyright start year and file exclusions for validation

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[Copilot]

Using @main for the workflow reference is not recommended for production. Consider pinning to a specific version or commit SHA to ensure reproducibility and avoid potential breaking changes from upstream updates.

[Copilot]

[nitpick] The exclusion list is quite extensive and on a single line, making it difficult to read and maintain. Consider breaking this into multiple lines or adding comments explaining why each pattern is excluded.

Suggested change

	filesexcluded: .github/*, README.md, Jenkinsfile, gradle/*, docker-compose.yml, *.gradle, gradle.properties, gradlew, gradlew.bat
	filesexcluded: \