refactor(signer)!: rename module signers to signer and constrain visibility

Author: David-Petrov

crates/common/src/signer/mod.rs

@@ -9,10 +9,10 @@ use ssz_derive::{Decode, Encode};
 use tree_hash::TreeHash;
 
 pub mod schemes;
-pub mod signers;
+mod signer;
 
 pub use schemes::{bls::BlsSecretKey, ecdsa::EcdsaSecretKey};
-pub use signers::{ConsensusSigner, Signer};
+pub use signer::{ConsensusSigner, Signer};
 
 pub type Pubkey<T> = <T as SecretKey>::PublicKey;