Add pre-commit config and test on CI

[hugovk]

No description provided.

[hugovk]

https://github.com/hugovk/cpython/runs/5434152609?check_suite_focus=true -> modifies:

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#       modified:  [2] Doc/library/turtle-star.ps
#       modified:  [3] Lib/asyncio/sslproto.py
#       modified:  [4] Lib/asyncio/transports.py
#       modified:  [5] Lib/codeop.py
#       modified:  [6] Lib/concurrent/futures/_base.py
#       modified:  [7] Lib/distutils/command/command_template
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#       modified:  [9] Lib/email/__init__.py
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#       modified: [12] Lib/email/encoders.py
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#       modified: [15] Lib/email/header.py
#       modified: [16] Lib/email/iterators.py
#       modified: [17] Lib/email/message.py
#       modified: [18] Lib/email/mime/audio.py
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#       modified: [22] Lib/email/mime/multipart.py
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#       modified: [25] Lib/email/parser.py
#       modified: [26] Lib/test/allsans.pem
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#       modified: [89] Modules/_io/_iomodule.c
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#       modified: [188] Tools/unicode/python-mappings/CP1140.TXT
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#       modified: [193] aclocal.m4