docs: add missing_docs attribute

Author: 110CodingP

src/anchor_trait.rs

@@ -1,3 +1,4 @@
+#![warn(missing_docs)]
 //! This module contains [`AnchorWithMetaData`] trait and implementations of the trait for some
 //! types.
 use bdk_chain::{Anchor, BlockId, ConfirmationBlockTime};

src/error.rs

@@ -1,3 +1,4 @@
+#![warn(missing_docs)]
 //! This module contains the crate's error type.
 use std::io::Error as IoError;
 

src/lib.rs

@@ -1,3 +1,4 @@
+#![warn(missing_docs)]
 //! This crate provides an alternative to the sqlite persistence backend for [`BDK`] using [`redb`],
 //! a lightweight key-value store in Rust.
 //!