Support YAML language server

[Sam-3Degrees]

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)

[thdxr]

/opencode fix this

[opencode-agent]

.git/hooks/pre-push: 2: bun: not found
error: failed to push some refs to 'https://github.com/sst/opencode'

opencode session  |  github run

[rekram1-node]

[automated] Closing due to 90+ days of inactivity. Feel free to reopen if you still need this!