fix(ci): update PR validation workflow to use types, subjectPattern and validateSingleCommit inputs

[hahirwar-cd]

Description

• Improved the reusable pr-check.yml workflow by making the PR title validation more flexible and configurable.
• The hardcoded regex was replaced with dynamic validation based on workflow inputs (types, subjectPattern, and requireScope).
• Added support for optional scope enforcement, configurable subject patterns, and capitalized commit types.
• Introduced a new commitlintConfig: input so repositories can provide their own Commitlint configuration file.
• Also added an optional validateSingleCommit check to enforce a single commit in PRs.
• Overall, the workflow is now more reusable, configurable, and aligned with Conventional Commit standards.

Type of Change

• 🐛 Bug fix
• ✨ New workflow
• 📝 Documentation update
• 🔧 Workflow enhancement
• 🎨 Code style/formatting
• ♻️ Refactoring
• ⚡ Performance improvement
• 🔒 Security improvement

Workflow Category

• Terraform (tf-*)
• CloudFormation (cf-*)
• Docker (docker-*)
• Helm (helm-*)
• PR Automation (pr-*)
• Security (security-*)
• Release (release-*)
• Notification (notify-*)
• AWS-specific (aws-*)
• GCP-specific (gcp-*)
• YAML Lint (yl-*)
• Other

Checklist

• My code follows the project's style guidelines
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have updated the documentation accordingly
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published