- Move cmd/core/cmd/* to cmd/* (flatten directory structure)
- Update module path from github.com/host-uk/core/cmd/core to github.com/host-uk/core
- Remove go.mod files from pkg/* (single module now)
- Simplify pkg/mcp to file operations only (no GUI deps)
- GUI features (display, webview, process) stay in core-gui/pkg/mcp
- Fix import aliases (sdkpkg) for package name conflicts
- Remove old backup directory (cmdbk)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>