doc: add doxygen comment for code

src/yycc/carton/binstore.hpp

@@ -5,4 +5,25 @@
 #include "binstore/configuration.hpp"
 #include "binstore/storage.hpp"
 
+/**
+ * @brief The main namespace for the binstore module.
+ * @details
+ * The binstore module provides a binary settings storage system that allows
+ * applications to persistently store and retrieve configuration settings in
+ * a binary format. It includes functionality for:
+ * 
+ * \li Type-safe serialization and deserialization of various data types
+ *     (integers, floating-point numbers, booleans, strings, enums)
+ * \li Setting management with unique tokens for access control
+ * \li Version control for configuration data with migration strategies
+ * \li File and stream-based storage operations
+ * \li Comprehensive error handling for robust operation
+ * 
+ * The main components are:
+ * \li types: Basic types and error handling for the module
+ * \li serdes: Serialization/deserialization functionality for different data types
+ * \li setting: Management of settings with name-based lookup and token-based access
+ * \li configuration: Version and settings collection management
+ * \li storage: Main storage class for loading/saving settings to/from files or streams
+ */
 namespace yycc::carton::binstore {}