Request: expose `cue` program as a Bazel run target

[folliehiyuki]

This issue requests a similar behavior as rules_go, where I can invoke the Go binary managed by Bazel simply with bazel run @rules_go//go. For example, instead of go mod tidy, I can run bazel run @rules_go//go -- mod tidy.

I use some CUE commands like fmt, fix regularly, so this request would save me from depending on the CUE CLI program in my host machine.

[jaqx0r]

Is the toolchain also public? If not can that also be included in this feature ?

Both of these being exposed would make cuelsp and cue fmt work nicely with https://github.com/buildbuddy-io/bazel_env.bzl