Description

Add support for YAML language server to improve editing experience for:

• Kubernetes manifests
• Docker Compose files
• GitHub Actions workflows
• CI/CD pipeline configurations
• OpenAPI specifications

Benefits

• Real-time schema validation
• Better error detection for DevOps workflows
• Improved AI code generation for YAML files
• Auto-completion for common YAML structures

Implementation

Similar to other LSPs, could auto-install yaml-language-server and support .yml/.yaml extensions.

Related

Contributes to #438 (more LSP support)