[WIP] feat(cesium): optional Cesium/ArcGIS reference + parity oracle crate #499

Job	Run time
Pass MSRV values to other jobs	2s
native-backend/stable	8m 1s
nostd/thumbv6m-none-eabi/stable	26s
tier4-avx512-check	27s
clippy/1.95.0	39s
format/stable	21s
hpc-stream-parallel/rayon	1m 22s
miri	0s
docs/nightly	-1s
nightly-simd-polyfill	0s
cargo-careful	0s
cross_test/${{ matrix.target }}/${{ matrix.rust }}	-1s
blas-msrv	1m 1s
tests/stable	11m 11s
tests/1.95.0	11m 17s
tests/beta	11m 25s
conclusion	0s
	46m 10s

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