feat: add basic pxd (#6) #22

Job	Run time
test (3.10, ubuntu-latest, skip_cython)	30s
lint	20s
Lint Commit Messages	11s
test (3.10, ubuntu-latest, use_cython)	46s
test (3.10, macOS-latest, skip_cython)	46s
test (3.10, macOS-latest, use_cython)	1m 57s
test (3.11, ubuntu-latest, skip_cython)	38s
test (3.11, ubuntu-latest, use_cython)	53s
test (3.11, macOS-latest, skip_cython)	49s
test (3.11, macOS-latest, use_cython)	3m 26s
test (3.12, ubuntu-latest, skip_cython)	41s
test (3.12, ubuntu-latest, use_cython)	58s
test (3.12, macOS-latest, skip_cython)	4m 8s
test (3.12, macOS-latest, use_cython)	2m 30s
release	1m 21s
Build wheels on macos-11	2m 52s
Build wheels on ubuntu-20.04	5m 26s
Build wheels on windows-2022	6m 43s
upload_pypi	56s
	35m 51s

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