Remove gpu_rand/README.md.

There is currently some overlap between the README and the rustdocs, but
the latter is truncated, presumably accidentally. This commit moves all
the contents into the rustdocs.

Author: nnethercote

crates/gpu_rand/README.md

@@ -1,13 +1,41 @@
-//! gpu_rand is the Rust CUDA Project's equivalent of cuRAND. cuRAND unfortunately does not work with
-//! the CUDA Driver API, therefore, we reimplement (and extend) some of its algorithms and provide them in this crate.
+//! gpu_rand is the Rust CUDA Project's equivalent of cuRAND. cuRAND unfortunately does not work
+//! with the CUDA Driver API, therefore, we reimplement (and extend) some of its algorithms and
+//! provide them in this crate.
 //!
-//! This crate is meant to be gpu-centric, which means it may special-case certain things to run faster on the GPU by using PTX
-//! assembly. However, it is supposed to also work on the CPU, allowing you to reuse the same random states across CPU and GPU.
+//! This crate is meant to be GPU-centric, which means it may special-case certain things to run
+//! faster on the GPU by using PTX assembly. However, it is supposed to also work on the CPU,
+//! allowing you to reuse the same random states across CPU and GPU.
+//!
+//! A lot of the initial code is taken from the [rust-random
+//! project](https://github.com/rust-random) and modified to make it able to pass to the GPU, as
+//! well as cleaning up certain things and updating it to edition 2024.
 //!
-//! A lot of the initial code is taken from the [rust-random project](https://github.com/rust-random) and modified to make it able to
-//! pass to the GPU, as well as cleaning up certain things and updating it to edition 2024.
 //! The following generators are implemented:
 //!
+//! The random generators currently implemented are:
+//!
+//! 32-bit:
+//! - Xoroshiro64**
+//! - Xoroshiro64*
+//! - Xoroshiro128+
+//! - Xoroshiro128++
+//! - Xoroshiro128**
+//!
+//! 64-bit:
+//! - Xoroshiro128+
+//! - Xoroshiro128++
+//! - Xoroshiro128**
+//! - Xoroshiro256+
+//! - Xoroshiro256++
+//! - Xoroshiro256**
+//! - Xoroshiro512+
+//! - Xoroshiro512++
+//! - Xoroshiro512**
+//! - SplitMix64
+//!
+//! We also provide a default 64-bit generator which should be more than enough for most
+//! applications. The default currently uses Xoroshiro128** but that is subject to change in the
+//! future.
 
 #![deny(missing_docs)]
 #![deny(missing_debug_implementations)]