Add contributing guidelines #826

Job	Run time
Code Quality	1m 16s
Mocked Tests (ubuntu-latest, Python 3.7)	2m 36s
Mocked Tests (ubuntu-latest, Python 3.8)	2m 33s
Mocked Tests (ubuntu-latest, Python 3.9)	3m 2s
Mocked Tests (ubuntu-latest, Python 3.10)	2m 32s
Mocked Tests (ubuntu-latest, Python 3.11)	2m 25s
Mocked Tests (ubuntu-latest, Python 3.12)	3m 36s
Mocked Tests (macos-latest, Python 3.7)	3m 10s
Mocked Tests (macos-latest, Python 3.8)	3m 23s
Mocked Tests (macos-latest, Python 3.9)	2m 39s
Mocked Tests (macos-latest, Python 3.10)	4m 32s
Mocked Tests (macos-latest, Python 3.11)	3m 13s
Mocked Tests (macos-latest, Python 3.12)	5m 18s
Mocked Tests (windows-latest, Python 3.7)	5m 50s
Mocked Tests (windows-latest, Python 3.8)	4m 53s
Mocked Tests (windows-latest, Python 3.9)	5m 33s
Mocked Tests (windows-latest, Python 3.10)	6m 18s
Mocked Tests (windows-latest, Python 3.11)	6m 49s
Mocked Tests (windows-latest, Python 3.12)	8m 38s
Live Tests	10m 35s
Test independent installs of clients (s3)	35s
Test independent installs of clients (azure)	29s
Test independent installs of clients (gs)	29s
Notify failed build	0s
	1h 30m 24s

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