[feature request] Cut new release and/or clarify release roadmap

**Is your feature request related to a problem? Please describe.**

I've been trying to get a nix flake working for Simon Marlow's book, and had a little bit of (now resolved) friction with `accelerate`.

It appears that `accelerate` is still seeing active development and compiles up to GHC 9.10 (see cce3400ab64c4c6e0af7a28f4281a5f27b03a896), but the latest commit (49a39ea6e3d2d13cbfa8605dcb57a29ef13db1f9) to the `stable` branch/`1.3.0.0` tag is 5 years old. This is reflected on [hackage](https://hackage.haskell.org/package/accelerate) as well, giving constraints on dependencies that are probably too restrictive -- not to mention what ever fixes and features are in the 300+ commits from 2020 til now!

**Describe the solution you'd like**

I'm new to the library, so I'm unfamiliar with the development status. There's plenty of valid reason why work might not be considered "stable", but:

- if all or some the work _is_ stable, getting a new major-or-minor version bump onto hackage would be great.
- if none of the work is release-ready, indicating in the README:
- what the release process is
- indicating in the README what _should_ be done by library users who would like a more recent version (working from `master`?)

**Describe alternatives you've considered**

None.

**Additional context**

I've submitted a [PR](https://github.com/NixOS/nixpkgs/pull/401552) to nixpkgs pulling directly from source.