add dora_ulite6 standalone node with command lifecycle status

Migrates the ulite6 Python dora node from dora_littlehand into a
self-contained repository following the dora-zed structure. Adds
command lifecycle state ("started"/"done"/"failed") and type
("command"/"error") to the status output so coordinator nodes can
reliably sequence robot actions without polling.

scripts/install.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+# Install dependencies for dora-ulite6.
+# Requires: Python >=3.8
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+REPO_DIR="${SCRIPT_DIR}/.."
+
+# Install uv if not present
+if ! command -v uv &>/dev/null; then
+    echo ">>> Installing uv..."
+    curl -LsSf https://astral.sh/uv/install.sh | sh
+fi
+
+# Create venv and install
+echo ">>> Installing dora-ulite6 in editable mode..."
+cd "$REPO_DIR"
+uv venv --seed --allow-existing
+uv pip install -e ".[dev]"
+
+echo ">>> Done. Activate with: source .venv/bin/activate"