Add codspeed workflow to run benchmarks #991

Job	Run time
sdist_verify	17s
allowed-fail-tests / Load tox environments	9s
docs / Load tox environments	6s
tests / Load tox environments	8s
docs / build_docs-notebooks (ubuntu-latest)	4m 42s
tests / py312 (ubuntu-latest)	5m 5s
tests / py311 (ubuntu-latest)	3m 44s
tests / py311-online (windows-latest)	5m 19s
tests / py310 (macos-latest)	3m 36s
tests / py310-oldestdeps (ubuntu-latest)	3m 22s
allowed-fail-tests / py311-devdeps (ubuntu-latest)	2m 11s
publish	0s
notify	0s
	28m 39s

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