feat: bootstrap Eldorado documentation and Pages publication

docs/overview.md

@@ -0,0 +1,21 @@
+---
+title: Explore the starting point
+description: Understand what this documentation foundation includes and what is still undecided.
+slug: /overview
+---
+
+This is the starting point for **Eldorado v1 documentation**. The purpose, audience, and content structure will be defined later.
+
+## What is included
+
+- A Docusaurus site with responsive navigation and local search.
+- An Eldorado-inspired visual theme with a dark header, gold accents, and Lato typography.
+- Automated checks on pull requests and publication to LEGO Cloud Pages after a push to `main`.
+
+## What remains open
+
+The documentation’s goals, ownership model, subject matter, and final information architecture are not yet agreed. This starter does not introduce product requirements, business claims, or a delivery roadmap.
+
+## Work on the foundation
+
+[Maintain and publish the site](./maintain.md) or [look up its configuration](./reference.md).