Add smooth cutoffs to distance tolerances #100

Job	Run time
Build and test in release mode (ubuntu-latest, 3.11, gcc, 13)	1m 24s
Build and test in release mode (ubuntu-latest, 3.13, gcc, 13)	1m 38s
Build and test in release mode (macos-latest, 3.11, gcc, 13)	1m 11s
Build and test in release mode (ubuntu-latest, 3.12, gcc, 13)	1m 41s
Build and test in release mode (macos-latest, 3.13, gcc, 13)	1m 29s
Build and test in release mode (macos-latest, 3.12, gcc, 13)	1m 9s
Build and test in debug mode (macos-latest, 3.12, gcc, 14)	1m 22s
Build and test in debug mode (ubuntu-latest, 3.13, gcc, 14)	1m 42s
Build and test in debug mode (macos-latest, 3.13, gcc, 13)	1m 23s
Build and test in debug mode (macos-latest, 3.12, gcc, 13)	1m 38s
Build and test in debug mode (ubuntu-latest, 3.12, gcc, 14)	1m 51s
Build and test in debug mode (ubuntu-latest, 3.12, gcc, 13)	1m 26s
Build and test in debug mode (macos-latest, 3.11, gcc, 13)	1m 22s
Build and test in debug mode (ubuntu-latest, 3.13, gcc, 13)	2m 4s
Build and test in debug mode (ubuntu-latest, 3.11, gcc, 13)	1m 26s
Build and test in debug mode (macos-latest, 3.11, gcc, 14)	1m 16s
Build and test in debug mode (macos-latest, 3.13, gcc, 14)	1m 23s
Build and test in debug mode (ubuntu-latest, 3.11, gcc, 14)	1m 38s
	27m 3s

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