ci: add PR automation workflows and labeling configuration

[IamLRBA]

Summary

This PR introduces a full PR automation setup designed to improve consistency, reduce manual overhead, and streamline the review process across the ODE project.

What’s Included

1. PR Title Validation

Added workflow: .github/workflows/pr-title-check.yml

• Enforces Conventional Commits for PR titles (type(scope): subject)
• Runs on PR open, edit, sync, and reopen
• Ensures clear, structured, and standardized PR titles

2. Automatic PR Labeling

• Added workflow: .github/workflows/auto-label.yml
• Added configuration: .github/labeler.yml
• Automatically labels PRs based on:
  • Changed file paths
  • PR body patterns
• Supports commit-type labels, component labels, and special-purpose labels
• Reduces manual triage work for maintainers

3. Monorepo-Aware CI Workflow

Added workflow: .github/workflows/ci.yml

• Uses path-based change detection to run only relevant jobs
• Supports each project component with tailored jobs:
  • Linting, testing, building
• Includes caching and concurrency controls
• Skips CI for documentation-only changes

Why This Is Important

• Encourages consistent PR practices
• Saves maintainer time through auto-labeling
• Speeds up CI by only running necessary jobs
• Improves clarity and predictability of contributions
• Moves the project toward maintainable, scalable workflows

How to Verify

• Open a PR with a valid and invalid title to test the validation workflow
• Modify files in different components to confirm selective CI runs
• Check that labels are applied automatically based on changes
• Confirm all workflows run successfully in GitHub Actions

Linked Issue

Fixes #23

cc @r0ssing
@Ndacyayisenga-droid

[Bahati308]

Hello @IamLRBA , this is great, I think since we have labels we can assign to PRs, for now we can ignore this (labelling part of the PR) and make sure the CI checks pass first cause it is really a priority.

[IamLRBA]

@Bahati308, I have been trying and I think the checks are good to go!
Thanks!