docs(adapters): adds docs for adapters

Signed-off-by: Bryan Cole <[email protected]>

tap_core/src/adapters/mod.rs

@@ -1,6 +1,20 @@
 // Copyright 2023-, Semiotic AI, Inc.
 // SPDX-License-Identifier: Apache-2.0
 
+//! The adapters module provides interfaces that allow flexibility in storing and verifying TAP components.
+//!
+//! Each adapter should be defined by the user of the library based on their specific storage and verification requirements. This modular design
+//! allows for easy integration with various storage solutions and verification procedures, thereby making the library adaptable to a wide range
+//! of use cases.
+//!
+//! The following adapters are defined:
+//! - `collateral_adapter`: An interface for checking and updating collateral availability.
+//! - `rav_storage_adapter`: An interface for storing and retrieving/replacing RAVs.
+//! - `receipt_checks_adapter`: An interface for verifying TAP receipts.
+//! - `receipt_storage_adapter`: An interface for storing, retrieving, updating, and removing TAP receipts.
+//!
+//! In addition, this module also includes mock implementations of each adapter for testing and example purposes.
+
 pub mod collateral_adapter;
 pub mod rav_storage_adapter;
 pub mod receipt_checks_adapter;