PDP-536: Adding copyright check

[SameeraPriyathamTadikonda]

No description provided.

[Copilot]

Pull Request Overview

This PR adds copyright header validation to the pull request workflow by integrating a reusable copyright check workflow and configuring exclusion rules.

• Added a copyright validation job to the existing PR workflow
• Created a copyright configuration file with exclusions for GitHub workflow files and README
• Updated the workflow name from "JIRA ID Validator" to "PR workflow" to reflect expanded functionality

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
.github/workflows/pr-workflow.yaml	Added copyright validation job and updated workflow name
.copyrightconfig	Created configuration file with start year 2022 and file exclusions

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