feat: improve contribute section documentation #7255

Job	Run time
Build linux1 wheel	7s
pick_server_suffix	1s
debug	1s
Style Check	7s
retro 232	0s
retro 241	0s
retro 242	0s
retro 251	0s
retro 222	0s
retro 231	0s
docs	0s
examples	0s
PyDPF-Post	0s
tests_any / Setup	1s
Build and Test on Docker / Build and Test On Docker (3.9, ubuntu-latest)	1s
Run examples on Docker / Setup	1s
tests / Setup	1s
upload-development-docs	0s
tests_any / Tests	1s
Run examples on Docker / Run Examples	1s
tests / Tests	1s
	23s

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