Use NVIDIA theme in library docs

[bdice]

We want to switch to use the NVIDIA theme in all Sphinx documentation. This is a tracking issue for that migration.

Documentation preview screenshots

• cuCIM — Update docs to use NVIDIA Sphinx theme cucim#1112
• cuDF — Update docs to use NVIDIA Sphinx theme cudf#23035, Align cuDF documentation branding cudf#23079
• cuGraph — Update docs to use NVIDIA Sphinx theme cugraph-docs#205
• cuML — Update docs to use NVIDIA Sphinx theme cuml#8308
• cuOpt — Align cuOpt documentation branding and Doxygen configuration NVIDIA/cuopt#1503
• cuVS — Remove legacy RAPIDS Doxygen theme assets NVIDIA/cuvs#2286
• Dask-CUDA — Update docs to use NVIDIA Sphinx theme dask-cuda#1662
• Deployment — Update docs to use NVIDIA Sphinx theme deployment#712
• KvikIO — Update docs to use NVIDIA Sphinx theme kvikio#996
• nvForest — Update docs to use NVIDIA Sphinx theme nvforest#151
• RAFT — Remove legacy RAPIDS docs theme assets NVIDIA/raft#3069
• rapids-cmake — Update docs to use NVIDIA Sphinx theme rapids-cmake#1045
• RapidsMPF — Update docs to use NVIDIA Sphinx theme rapidsmpf#1117
• RMM — Update RMM docs to use NVIDIA theme rmm#2443, Align RMM documentation branding rmm#2461
• UCXX — Update docs to use NVIDIA Sphinx theme ucxx#695