fix: update Honcho config path to HoardingCow, point fork to Hermes/honcho

- Update Dockerfile to clone from code.lazyworkhorse.net/Hermes/honcho.git
  (uses build arg HONCHO_REPO, can be overridden at build time)
- Add config.toml volume mount from HoardingCow persistent path
- Use named volume honcho_data instead of host bind mount
- Declare honcho_data as external volume in top-level volumes section

ai/honcho/Dockerfile

@@ -7,7 +7,7 @@ RUN apt-get update && \
 
 COPY --from=ghcr.io/astral-sh/uv:0.9.24 /uv /bin/uv
 
-ARG HONCHO_REPO=https://github.com/plastic-labs/honcho
+ARG HONCHO_REPO=https://code.lazyworkhorse.net/Hermes/honcho.git
 ARG HONCHO_REF=main
 RUN git clone --depth 1 --branch ${HONCHO_REF} ${HONCHO_REPO} /app