fix(docs): add rust_crypto feature to docs.rs build

Add `rust_crypto` feature to docs.rs build to resolve failing docs.rs
build.

Closes #440

Author: dsykes16

Cargo.toml

@@ -19,6 +19,9 @@ include = [
 ]
 rust-version = "1.85.0"
 
+[package.metadata.docs.rs]
+features = ["rust_crypto"]
+
 [dependencies]
 base64 = "0.22"
 serde = { version = "1.0", features = ["derive"] }
@@ -37,7 +40,9 @@ ed25519-dalek = { version = "2.1.1", optional = true, features = ["pkcs8"] }
 hmac = { version = "0.12.1", optional = true }
 p256 = { version = "0.13.2", optional = true, features = ["ecdsa"] }
 p384 = { version = "0.13.0", optional = true, features = ["ecdsa"] }
-rand = { version = "0.8.5", optional = true, features = ["std"], default-features = false }
+rand = { version = "0.8.5", optional = true, features = [
+    "std",
+], default-features = false }
 rsa = { version = "0.9.6", optional = true }
 sha2 = { version = "0.10.7", optional = true, features = ["oid"] }