Add cookiecutter templates for CI #469

Job	Run time
check-commits	12s
build / build	17s
lint / lint (3.8)	34s
lint / lint (3.11)	30s
codeql / Analyze	2m 39s
test / test (3.11, nightly, /relocated/djnd/)	13m 43s
test / test (3.11, latest)	13m 24s
test / test (3.6, 3.28)	14m 58s
test / test (3.7, 3.23, true)	10m 27s
test / test (3.8, 3.22)	11m 46s
test / test (3.9, 3.21, /relocated/djnd/)	11m 12s
test / test (3.10, 3.18, true)	10m 51s
ready-to-ship	1s
	1h 30m 34s

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