feat: add conventional commits workflow

[nearlyforget]

Description

This PR introduces a GitHub Action to enforce Conventional Commits for all Pull Requests in this repository.

Changes:

• Added .github/workflows/conventional-commits.yml.
• Configured amannn/action-semantic-pull-request@v6 to validate PR titles on opened, edited, and synchronize events.

Motivation:
Enforcing conventional commits (e.g., feat:, fix:, chore:) ensures a consistent and readable commit history across the organization. This also enables automated changelog generation and semantic versioning in the future.

Type of change

• New feature (non-breaking change which adds functionality)

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Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• Any dependent changes have been merged and published in downstream modules