isOfficialMarketplaceSkill function
Check if a skill command is from an official marketplace.
Implementation
bool isOfficialMarketplaceSkill(SkillCommand command) {
if (command.source != 'plugin' || command.pluginInfo == null) return false;
final parsed = parsePluginIdentifier(command.pluginInfo!.repository);
return isOfficialMarketplaceName(parsed.marketplace);
}