Implement Data Sources #1147

Job	Run time
Generate comparison results	9m 2s
Test source with coverage	10m 9s
Test package (3.11 on ubuntu-latest)	4m 35s
Test package (3.11 on macos-latest)	5m 42s
Test package (3.10 on ubuntu-latest)	4m 45s
Test package (3.10 on macos-latest)	5m 16s
Test package (3.10 on windows-latest)	6m 24s
Test package (3.9 on ubuntu-latest)	5m 9s
Test package (3.9 on macos-latest)	5m 53s
Test package (3.9 on windows-latest)	8m 1s
Test package (3.8 on ubuntu-latest)	4m 40s
Test package (3.8 on macos-latest)	5m 28s
	1h 15m 4s

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