Move all Wails-dependent packages to core-gui repo:
- pkg/core, pkg/display, pkg/docs, pkg/help, pkg/ide
- pkg/runtime, pkg/webview, pkg/workspace, pkg/ws
- pkg/plugin, pkg/config, pkg/i18n, pkg/module
- pkg/crypt, pkg/io, pkg/process
Add pkg/errors with simple E() helper for error wrapping.
Update go.work to only include CLI-relevant packages.
CLI now builds with CGO_ENABLED=0 - no linker warnings.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
