build: take mcp-to-cli from crates.io

The crate now lives in its own repository and publishes on its own
line, so rhema-mcp depends on 0.1.0 instead of the path. The publish
list drops it — the check only follows in-tree edges — and the two
Dockerfiles stop copying a manifest that no longer exists.

deploy/docker/sandboxd.Dockerfile

@@ -12,7 +12,6 @@ WORKDIR /build
 
 # Manifests first: the registry cache this populates survives source edits.
 COPY Cargo.toml Cargo.lock rust-toolchain.toml ./
-COPY crates/mcp-to-cli/Cargo.toml crates/mcp-to-cli/Cargo.toml
 COPY crates/rhema-acp/Cargo.toml crates/rhema-acp/Cargo.toml
 COPY crates/rhema-agent-tools/Cargo.toml crates/rhema-agent-tools/Cargo.toml
 COPY crates/rhema-autonomous-agent/Cargo.toml crates/rhema-autonomous-agent/Cargo.toml