* Added instructions for Azure DevOps pipelines
Added new instructions on best practices for Azure DevOps pipeline YAML files in `azure-devops-pipelines.instructions.md`. Sections include general guidelines, pipeline structure, build best practices, test integration, security considerations, deployment strategies, variable and parameter management, performance optimization, monitoring and observability, template reusability, and branching and triggering strategies. An example YAML pipeline structure and a list of common anti-patterns to avoid have also been added.
* fix following the copilot's comments
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Co-authored-by: Christophe Peugnet <christophe.peugnet@outlook.fr>
