chore(ansible): use project-local uv venv for ansible runtime deps

Moves the local ansible runtime from a global `uv tool install ansible-core`
(which required remembering `--with kubernetes --with jmespath --with dnspython`)
to a project-managed venv described by `pyproject.toml` + `uv.lock`. Fixes the
"Failed to import the required Python library (kubernetes)" error on localhost.

The localhost inventory entry now derives `ansible_python_interpreter` from
`{{ ansible_playbook_python }}`, so `uv run ansible-playbook` is enough — no
more hardcoded user-specific paths.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

pyproject.toml

@@ -0,0 +1,11 @@
+[project]
+name = "arcodange-factory"
+version = "0.0.0"
+description = "Ansible automation for the Arcodange factory homelab"
+requires-python = ">=3.12,<3.13"
+dependencies = [
+    "ansible-core",
+    "kubernetes",
+    "jmespath",
+    "dnspython",
+]