Rust

Add Dup Sort Custom Comparator support #511

Job	Run time
Check all the features of the heed project	29s
Check the heed3 project (ubuntu-latest)	19s
Ensure clippy is happy on heed and heed3	24s
Check all the features of the heed3 project	2m 5s
Check the heed3 project (windows-latest)	2m 20s
Run the heed examples (ubuntu-latest)	39s
Check the heed3 project (macos-latest)	34s
Ensure the heed and heed3 project are formatted	16s
Run the heed examples (macos-latest)	31s
Run the heed3 examples (ubuntu-latest)	24s
Run the heed3 examples (macos-latest)	43s
Test the heed3 project (ubuntu-latest)	47s
Ensure heed3 is not erasing heed	3s
Test the heed project (ubuntu-latest)	40s
Test the heed3 project (windows-latest)	2m 49s
Test the heed project (windows-latest)	2m 39s
Test the heed3 project (macos-latest)	47s
Test the heed project (macos-latest)	39s
	17m 8s

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