Convert code of conduct to markdown for Github (GH-9776)

Author: ammaraskar

CODE_OF_CONDUCT.md

@@ -0,0 +1,12 @@
+# Code of Conduct
+
+Please note that all interactions on
+[Python Software Foundation](https://www.python.org/psf-landing/)-supported
+infrastructure is [covered](https://www.python.org/psf/records/board/minutes/2014-01-06/#management-of-the-psfs-web-properties>)
+by the [PSF Code of Conduct](https://www.python.org/psf/codeofconduct/),
+which includes all infrastructure used in the development of Python itself
+(e.g. mailing lists, issue trackers, GitHub, etc.).
+
+In general this means everyone is expected to be open, considerate, and
+respectful of others no matter what their position is within the project.
+