Catalyst Signed Documents crate's integration tests

[Mr-Leshiy]

Summary

For the catalyst-signed-doc crate add tests to cover all topics based on the spec

Description

Add a Rust integration tests for the catalyst-signed-doc crate, by adding them under signed_doc/tests dir.
Need to test our public API of the crate by the following sections:

• Decoding tests (move and probably extend current catalyst_signed_doc_cbor_roundtrip_test test).
• Signature validation (move and probably update current signature_verification_test test).
• Validation tests (test pub async fn validate<Provider>( doc: &CatalystSignedDocument, provider: &Provider, ) -> anyhow::Result<bool>)
  • Proposal document tests (following the proposal document spec)
  • Comment document tests (following the comment document spec)

As a reference how to build and run this validation you can take a look for each rules unit test (catalyst-libs/rust/signed_doc/src/validator/rules)