Document official Poetry badge (#8066)

README.md

 # Poetry: Python packaging and dependency management made easy
 
+[![Poetry](https://img.shields.io/endpoint?url=https://python-poetry.org/badge/v0.json)](https://python-poetry.org/)
 [![Stable Version](https://img.shields.io/pypi/v/poetry?label=stable)][PyPI Releases]
 [![Pre-release Version](https://img.shields.io/github/v/release/python-poetry/poetry?label=pre-release&include_prereleases&sort=semver)][PyPI Releases]
 [![Python Versions](https://img.shields.io/pypi/pyversions/poetry)][PyPI]

docs/community.md

+---
+title: "Community"
+draft: false
+type: docs
+layout: single
+
+menu:
+  docs:
+    weight: 105
+---
+
+# Community
+
+## Badge
+
+For any projects using Poetry, you may add its official badge somewhere prominent like the README.
+
+[![Poetry](https://img.shields.io/endpoint?url=https://python-poetry.org/badge/v0.json)](https://python-poetry.org/)
+
+**Markdown**
+```md
+[![Poetry](https://img.shields.io/endpoint?url=https://python-poetry.org/badge/v0.json)](https://python-poetry.org/)
+```
+
+**reStructuredText**
+```rst
+.. image:: https://img.shields.io/endpoint?url=https://python-poetry.org/badge/v0.json
+   :alt: Poetry
+   :target: https://python-poetry.org/
+```