DSL builder for coachmark sequences

[aldefy]

Summary

Fluent DSL builder for defining multi-step coachmark tours.

Proposed API

coachmarkController.tour("onboarding") {
    step("settings") {
        title = "Settings"
        description = "Customize your preferences"
        shape = circle(radiusPadding = 12.dp)
        connector = elbow()
    }
    step("profile") {
        title = "Profile"
        description = "View your account"
        shape = squircle()
    }
    onComplete { analytics.track("onboarding_done") }
}

Benefits

• More readable than building List<CoachmarkTarget> manually
• Inline callbacks per step
• Named tours for analytics/persistence

Part of the v1.3 roadmap.