[new] Proposal to import devel/cargo-nextest 0.9.72

Hi,

I propose to import cargo-nextest in category devel.

cargo-nextest is a next-generation test runner for Rust ; used by some projects, especially for CI.
- Main site: https://nexte.st/
- GH repository: https://github.com/nextest-rs/nextest

Create initial devel/cargo-nextest port for the latest version 0.9.72

- create Makefile, distinfo and crates.inc
- BDEP / lib DEPS with zstd + MODCARGO_RUSTFLAGS to use it during build
- disable self-update via Rust feature "default-no-update"
- add a specific target for "install": Nextest's own tests do not work with "cargo test"

Build and tests OK on current/amd64 with Rust 1.78.0.

Tool used to test some Rust projects without any issue.

Comments/tests welcome and please commit it OK.

Laurent