Add contributing guidelines #819

Job	Run time
Code Quality	1m 16s
Mocked Tests (ubuntu-latest, Python 3.7)	2m 33s
Mocked Tests (ubuntu-latest, Python 3.8)	2m 19s
Mocked Tests (ubuntu-latest, Python 3.9)	2m 36s
Mocked Tests (ubuntu-latest, Python 3.10)	2m 11s
Mocked Tests (ubuntu-latest, Python 3.11)	2m 15s
Mocked Tests (macos-latest, Python 3.7)	3m 13s
Mocked Tests (macos-latest, Python 3.8)	3m 9s
Mocked Tests (macos-latest, Python 3.9)	3m 19s
Mocked Tests (macos-latest, Python 3.10)	3m 21s
Mocked Tests (macos-latest, Python 3.11)	3m 14s
Mocked Tests (windows-latest, Python 3.7)	5m 50s
Mocked Tests (windows-latest, Python 3.8)	7m 15s
Mocked Tests (windows-latest, Python 3.9)	5m 24s
Mocked Tests (windows-latest, Python 3.10)	4m 41s
Mocked Tests (windows-latest, Python 3.11)	5m 11s
Live Tests	11m 10s
Test independent installs of clients (s3)	38s
Test independent installs of clients (azure)	35s
Test independent installs of clients (gs)	28s
Notify failed build	0s
	1h 10m 38s

Provide feedback