[WIP] feat(cesium): optional Cesium/ArcGIS reference + parity oracle crate #502

Job	Run time
hpc-stream-parallel/rayon	1m 21s
clippy/1.95.0	40s
format/stable	22s
nostd/thumbv6m-none-eabi/stable	29s
tier4-avx512-check	30s
Pass MSRV values to other jobs	3s
native-backend/stable	7m 44s
docs/nightly	0s
nightly-simd-polyfill	0s
cross_test/${{ matrix.target }}/${{ matrix.rust }}	0s
miri	-1s
cargo-careful	-1s
blas-msrv	47s
tests/1.95.0	11m 15s
tests/stable	10m 34s
tests/beta	11m 11s
conclusion	0s
	44m 54s

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