Launch docs and external readiness

Problem

External users encountering Dataface's chart library for the first time have no documentation explaining which chart types are available, what the default styling behavior is, how to customize colors/axes/labels, or what data shapes each chart type expects. Internal knowledge about the visual language system lives in code, design docs, and team context — none of which is accessible to new users. Without executable examples (YAML snippets that produce real charts) and clear reference documentation, adoption will stall at the "how do I make a basic line chart" stage regardless of how good the rendering is.

Context

Possible Solutions

Plan

Implementation Progress

Review Feedback

• Review cleared