[WIP] feat(cesium): optional Cesium/ArcGIS reference + parity oracle crate #505

Job	Run time
Pass MSRV values to other jobs	2s
tier4-avx512-check	30s
native-backend/stable	8m 16s
clippy/1.95.0	39s
format/stable	22s
hpc-stream-parallel/rayon	1m 24s
nostd/thumbv6m-none-eabi/stable	30s
nightly-simd-polyfill	0s
cross_test/${{ matrix.target }}/${{ matrix.rust }}	0s
miri	0s
docs/nightly	0s
cargo-careful	0s
blas-msrv	48s
tests/beta	11m 12s
tests/1.95.0	10m 38s
tests/stable	11m 13s
conclusion	0s
	45m 34s

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