remove pre-EAR format description and add pointers to EAR resources

Signed-off-by: Thomas Fossati <[email protected]>

Author: thomas-fossati

datamodels/attestation-results/README.md

@@ -1,7 +1,11 @@
 ## Attestation Results
 
-This directory contains a JSON/CBOR serialisation based on the information model described in the [Attestation Results for Secure Interactions](https://datatracker.ietf.org/doc/draft-ietf-rats-ar4si/) Internet-Draft.
+Veraison's attestation result format, which was once described at this place, is now superseded by [EAR](https://datatracker.ietf.org/doc/draft-fv-rats-ear).
 
-Veraison produces its attestation results (i.e., the output of attestation evidence appraisal) in the format specified by the files in the [grammar](grammar) directory, which also contains a number of [examples](grammar/examples) for both CBOR and JSON serialisations.
+If you need to ask questions about EAR, feel free to join [this Zulip stream](https://veraison.zulipchat.com/#narrow/stream/357929-EAR/).
 
-The grammar is specified using [CDDL](https://datatracker.ietf.org/doc/rfc8610/) whilst the examples are in CBOR [diagnostic](https://datatracker.ietf.org/doc/html/rfc8949#section-8) notation.
+If you want to use EAR in your codebase, the Veraison project provides three separate implementations:
+
+* [`veraison/ear`](https://github.com/veraison/ear), a Golang package that allows encoding, decoding, signing and verification of EAR payloads together with a CLI ([`arc`](https://github.com/veraison/ear/tree/main/arc)) to create, verify and visualize EARs on the command line.
+* [`C EAR`](https://github.com/veraison/c-ear), a C17 library that allows verification and partial decoding of EAR payloads.
+* [Rust EAR](https://github.com/veraison/rust-ear), a Rust (2021 edition) library that allows verification and decoding of EAR payloads.