[DOC]: Document graph capture support

### Is this a duplicate?

- [X] I confirmed there appear to be no [duplicate issues](https://github.com/NVIDIA/cccl/issues) for this bug and that I agree to the [Code of Conduct](CODE_OF_CONDUCT.md)

### Is this for new documentation, or an update to existing docs?

New

### Describe the incorrect/future/missing documentation

We introduced https://github.com/NVIDIA/cccl/issues/321 graph capture coverage in CUB tests. CUB currently has documentation annotations such as cdp_class{1} to indicate when an algorithm can be launched from device code using CUDA Dynamic Parallelism. We should add a similar Doxygen alias for CUDA Graph capture support so algorithm documentation can clearly indicate whether a CUB API is safe or intended to be used during CUDA stream capture.

### If this is a correction, please provide a link to the incorrect documentation. If this is a new documentation request, please link to where you have looked.

_No response_