Add docs

docs/content/usage/pre-commit.md

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+---
+title: Pre-Commit
+---
+
+ansible-later can be used with the [pre-commit][pre-commit] framework:
+
+<!-- prettier-ignore-start -->
+<!-- markdownlint-disable -->
+<!-- spellchecker-disable -->
+{{< highlight yaml "linenos=table" >}}
+- repo: https://github.com/thegeeklab/ansible-later
+  rev: v3.0.2  # or whatever tag you want
+  hooks:
+    - id: ansible-later
+{{< /highlight >}}
+<!-- spellchecker-enable -->
+<!-- markdownlint-restore -->
+<!-- prettier-ignore-end -->
+
+[pre-commit]: https://pre-commit.com/