feat(rust/signed-doc): parameters metadata field link validation (#576)

* added parameters link_check

* add parameters more tests

* fix fmt

* fix clippy

Author: Mr-Leshiy

rust/signed_doc/Cargo.toml

@@ -34,6 +34,7 @@ base64-url = "3.0.0"
 rand = "0.8.5"
 uuid = { version = "1.12.0", features = ["v7"] }
 tokio = { version = "1.42.0", features = [ "macros" ] }
+test-case = "3.3.1"
 
 [[bin]]
 name = "mk_signed_doc"