feat(macos): show skills in onboarding

apps/macos/Sources/Clawdis/Onboarding.swift

@@ -80,6 +80,8 @@ struct OnboardingView: View {
     @State var preferredGatewayID: String?
     @State var gatewayDiscovery: GatewayDiscoveryModel
     @State var onboardingChatModel: ClawdisChatViewModel
+    @State var onboardingSkillsModel = SkillsSettingsModel()
+    @State var didLoadOnboardingSkills = false
     @State var localGatewayProbe: LocalGatewayProbe?
     @Bindable var state: AppState
     var permissionMonitor: PermissionMonitor