Initial commit: project docs and ignore rules

.gitignore

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+.DS_Store
+*.gz
+*.log

README.md

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+# BW16 project (easy mode 2)
+
+Wrapper folder for **RTL8720dn-Deauther** — ESP32-Deauther-style tooling ported to the **Realtek RTL8720** family (Arduino core).
+
+## Primary project
+
+| Path | Purpose |
+|------|---------|
+| `RTL8720dn-Deauther/` | Arduino project; see its [README](RTL8720dn-Deauther/README.md) for IDE setup, bridges for UART, and web UI access. |
+
+## Build (short)
+
+Use **Arduino IDE** with Realtek board support (board manager URL from upstream). Open the sketch folder under `RTL8720dn-Deauther/` and upload.
+
+Educational / authorized testing contexts only; follow upstream license and disclaimers.
+
+## Related
+
+[`WORKSPACE.md`](../WORKSPACE.md) — sibling RTL/BW16 projects (`rtl BW16/`, `rtl bw16 X esp32/`).