slh-dsa: improve README.md (#826)

slh-dsa/README.md

@@ -1,18 +1,28 @@
-# SLH-DSA
+# [RustCrypto]: SLH-DSA
+
+[![crate][crate-image]][crate-link]
+[![Docs][docs-image]][docs-link]
+[![Build Status][build-image]][build-link]
+![Apache2/MIT licensed][license-image]
+![MSRV][rustc-image]
+[![Project Chat][chat-image]][chat-link]
 
 Pure Rust implementation of the SLH-DSA (aka SPHINCS+) signature scheme.
 
-Implemented based on the [FIPS-205 Inital Public Draft](https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.205.ipd.pdf)
+Implemented based on the [FIPS-205 Inital Public Draft].
 
 ## ⚠️ Security Warning
 
 The implementation contained in this crate has never been independently audited!
 
 USE AT YOUR OWN RISK!
 
-## Minimum Supported Version
+## Minimum Supported Rust Version
+
+This crate requires **Rust 1.75** at a minimum.
 
-This crate has only been tested with Rust 1.75+
+We may change the MSRV in the future, but it will be accompanied by a minor
+version bump.
 
 ## License
 
@@ -28,3 +38,19 @@ at your option.
 Unless you explicitly state otherwise, any contribution intentionally submitted
 for inclusion in the work by you, as defined in the Apache-2.0 license, shall be
 dual licensed as above, without any additional terms or conditions.
+
+[crate-image]: https://buildstats.info/crate/slh-dsa
+[crate-link]: https://crates.io/crates/slh-dsa
+[docs-image]: https://docs.rs/slh-dsa/badge.svg
+[docs-link]: https://docs.rs/slh-dsa/
+[build-image]: https://github.com/RustCrypto/signatures/actions/workflows/slh-dsa.yml/badge.svg
+[build-link]: https://github.com/RustCrypto/signatures/actions/workflows/slh-dsa.yml
+[license-image]: https://img.shields.io/badge/license-Apache2.0/MIT-blue.svg
+[rustc-image]: https://img.shields.io/badge/rustc-1.75+-blue.svg
+[chat-image]: https://img.shields.io/badge/zulip-join_chat-blue.svg
+[chat-link]: https://rustcrypto.zulipchat.com/#narrow/stream/260048-signatures
+
+[//]: # (links)
+
+[RustCrypto]: https://github.com/RustCrypto
+[FIPS-205 Inital Public Draft]: https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.205.ipd.pdf