Register <gcode-preview> (idempotent — safe to call repeatedly and from multiple
bundles). Kept as a function (not a module side effect) so the package stays
sideEffects: false; import @chestnutlabs/gcode-preview-element/define for auto-registration.
@chestnutlabs/gcode-preview-element — the framework-free
<gcode-preview>Web Component adapter (DD-009 D5), a thin shell over @chestnutlabs/gcode-preview-core. Registration is a function (defineGcodePreview) so the.entry stays side-effect-free; import@chestnutlabs/gcode-preview-element/defineto auto-register.