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.

pyproject.toml

@@ -0,0 +1,28 @@
+[project]
+name = "dora-ulite6"
+version = "0.1.0"
+license = "MIT"
+authors = [
+  { name = "Dora" }
+]
+description = "Dora node for controlling the UFactory Lite6 robot"
+
+requires-python = ">=3.8"
+
+dependencies = [
+  "dora-rs >= 0.3.9",
+  "numpy < 2.0.0",
+  "scipy >= 1.14.0",
+  "xarm-python-sdk >= 1.17.3",
+  "fastapi >= 0.109.0",
+  "uvicorn >= 0.27.0",
+]
+
+[dependency-groups]
+dev = ["pytest >=8.1.1", "ruff >=0.9.1"]
+
+[project.scripts]
+dora-ulite6 = "dora_ulite6.main:main"
+
+[tool.setuptools]
+packages = ["dora_ulite6"]