dora-rs 1.0.1 requires Python 3.11+. Drops the numpy<2 pin, which the
littlehand lockfile shows is unnecessary with the current xArm SDK, and
moves to hatchling with a uv lockfile that CI installs with --locked so a
dependency change that was never locked cannot reach main.
Removes scripts/install.sh: uv sync is the whole install now.
Apply Z-axis tool offset when publishing tcp_pose so the output
reflects the actual tool tip. Adds TOOL_TYPE (none/vacuum/gripper)
and TOOL_OFFSET_MM env vars with standard Lite6 accessory presets.
Bump version to 0.1.2.