📖 [docs][ansible] Add README (#91)

https://claude.ai/code/session_019mL7JrivCV6PskSdt7TMhP

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Co-authored-by: Claude <noreply@anthropic.com>

Author: tomy0000000

pkg/ansible/README.md

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+# `ansible`
+
+Deploys Ansible configuration and a starter inventory file into `$HOME`.
+
+## Installs
+
+This package does not install Ansible — it only manages configuration. Install
+Ansible separately (e.g. `pip install ansible` or via your OS package manager).
+
+## Configures
+
+- `~/.ansible.cfg` (stow) — sets `inventory = ~/.ansible/hosts`,
+  `gathering = explicit`, and `nocows = True`
+- `~/.ansible/hosts` (stow) — starter inventory template with a placeholder
+  group and default `ansible_user` / `ansible_python_interpreter` vars
+
+## Notes
+
+- Edit `~/.ansible/hosts` to replace the `name`/`ip.or.hostname` placeholder
+  with real hosts before running any playbooks.
+- `gathering = explicit` means facts are only collected when explicitly
+  requested, which speeds up playbook runs.