feat: launch 3d architecture documentation portal

scope/initial-deliverable.md

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+---
+title: "Initial Deliverable"
+description: "Apply the browser POC boundary to kickoff decisions."
+---
+
+# Deliver one navigable model
+
+The initial deliverable is a browser proof of concept that visualizes **one architecture model in navigable 3D**.
+
+## Included
+
+- One architecture model
+- Browser-based rendering
+- Camera navigation
+- Element selection and readable identity
+
+## Deferred
+
+Editing, collaboration, import pipelines, and production hardening follow validated POC learning.

scope/overview.md

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+---
+title: "Product Scope"
+description: "Use the product purpose to evaluate proposed work."
+slug: /
+---
+
+# Frame product scope
+
+3D Architecture Wizzard is an interactive 3D application for exploring, designing, and communicating software and system architecture.
+
+The product serves architecture authors, reviewers, and stakeholders who need a shared spatial view of a model.