Initial scaffold: docs, data manifest, and static dashboard

README.md

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+# Power BI Dashboard Migration
+
+Goal: Recreate the existing Power BI report as a custom dashboard app using the provided CSV/DAX exports as the source of truth.
+
+## Project Goals
+1. Recreate report visuals and KPIs exactly (no approximation).
+2. Match all KPI values against source data.
+3. Build a dashboard UI with filters, charts, and tables.
+4. Commit after each step.
+
+## Repo Structure
+```
+app/                # Simple dashboard app (static for now)
+data/               # Local CSVs + manifest
+/docs/              # Migration docs
+```
+
+## Getting Started (Local)
+Open `app/index.html` in a local static server (CSV fetch requires HTTP):
+
+```bash
+python -m http.server 8080
+```
+
+Then visit: http://localhost:8080/app/
+
+## Next Steps
+- Add CSV exports to `/data` and update `data/manifest.json`.
+- Define KPI formulas in `docs/kpi-definitions.md`.
+- Implement calculations in `app/app.js`.