merge #5512 again after reverting due to incorrect rebase (#5520)

* setup workspace global lints to prevent needless panics

* removed sources of panic in nym-crypto, nym-node and nym-api

* adjusted test code

nym-node/src/cli/commands/sign.rs

@@ -68,6 +68,8 @@ fn print_signed_contract_msg(
     println!("{}", output.format(&sign_output));
 }
 
+// SAFETY: clippy ArgGroup ensures only a single branch is actually called
+#[allow(clippy::unreachable)]
 pub async fn execute(args: Args) -> Result<(), NymNodeError> {
     let config = try_load_current_config(args.config.config_path()).await?;
     let identity_keypair =