Launch docs and external readiness

Problem

External users who install the Dataface extension from the marketplace will have no documentation explaining how to set it up, connect to a dbt project, author dashboards, or interpret diagnostic messages. The existing internal runbooks assume FT Analytics conventions and skip foundational setup steps. Without executable getting-started guides, example dashboards, and reference documentation for diagnostics and preview behavior, new users will fail at installation or first use and uninstall immediately. The extension's marketplace listing also needs clear feature descriptions and screenshots to set accurate expectations before install.

Context

Possible Solutions

Plan

Implementation Progress

Review Feedback

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