feat: add RapidOCR QEMU console capture

tools/README.md

@@ -0,0 +1,26 @@
+# Development tools
+
+## QEMU console OCR
+
+Capture the current QEMU VGA screen and print detected console text:
+
+```powershell
+uv run python tools/qemu_ocr.py
+```
+
+Useful options:
+
+```powershell
+# Machine-readable boxes, confidence scores, and text
+uv run python tools/qemu_ocr.py --json
+
+# OCR an existing screenshot without recapturing
+uv run python tools/qemu_ocr.py --image .qemu/qemu-screen.png
+
+# Save extracted text
+uv run python tools/qemu_ocr.py -o .qemu/qemu-screen.txt
+```
+
+The tool invokes `.qemu/screenshot.ps1`, runs RapidOCR with ONNX Runtime, sorts
+recognized lines by screen position, and emits UTF-8 text. Screenshots and OCR
+output under `.qemu/` remain ignored build artifacts.