fix: add cmake, ninja-build and libusb to runtime image

- cmake and ninja are required by ESP-IDF compilation pipeline but were
  missing from the final stage, causing all ESP32 compilations to fail
- libusb-1.0-0 fixes the openocd-esp32 shared library warning on startup

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Dockerfile.standalone

@@ -93,6 +93,9 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     libslirp0 \
     libpixman-1-0 \
     libfdt1 \
+    cmake \
+    ninja-build \
+    libusb-1.0-0 \
     && apt-get clean \
     && rm -rf /var/lib/apt/lists/*