Improve geometry APIs, to be closer to `euclid` #4841

Job	Run time
clippy-check	4m 48s
format	6s
smithay-check-features	2m 52s
smithay-tests	2m 26s
check-minimal	1m 8s
check-msrv	1m 49s
anvil-check-features	2m 4s
smallvil-check	1m 25s
Documentation on Github Pages	1m 3s
WLCS: Core tests	1m 20s
WLCS: Output tests	1m 5s
WLCS: Pointer input tests	1m 3s
WLCS: Bad Buffer Test	1m 16s
	22m 25s

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