ec463fe7c7
- Updated minimum Bun engine requirement from 1.2.0 to 1.3.7 across root and coding-agent packages. - Added Bun version validation to install.ps1 with Get-BunVersion, Test-BunVersion, and Assert-BunVersion functions to enforce minimum version requirement. - Added Bun version validation to install.sh with version_ge and require_bun_version functions to enforce minimum version requirement.