NOTICK - Fix namespace allocation for C++ Serialiser

Now things are working for the most part, move the readers into their
own internal namespace. Also start creating an actual separation of the
interface and the implementation with some Interface classes at the
non internal level.

experimental/cpp-serializer/include/amqp/reader/IReader.h

@@ -0,0 +1,75 @@
+#pragma once
+
+/******************************************************************************/
+
+#include <any>
+
+#include "amqp/AMQPDescribed.h"
+
+#include "amqp/schema/Schema.h"
+
+/******************************************************************************
+ *
+ * Forward declarations
+ *
+ ******************************************************************************/
+
+struct pn_data_t;
+
+/******************************************************************************
+ *
+ * class amqp::reader::IValue
+ *
+ ******************************************************************************/
+
+/**
+ * Used by the dump method on all instantiated instances of amqp readers
+ * it represents the ability to pull out a value from the blob as determined
+ * by the reader type and convert it to a string formatted nicely as JSON
+ */
+namespace amqp::reader {
+
+    class IValue {
+        public :
+            virtual std::string dump() const = 0;
+
+            virtual ~IValue() = default;
+    };
+
+}
+
+/******************************************************************************
+ *
+ * class ampq::reader::IReader
+ *
+ ******************************************************************************/
+
+namespace amqp::reader {
+
+    template <class SchemaIterator>
+    class IReader {
+        public :
+            using SchemaType = amqp::schema::ISchema<SchemaIterator>;
+
+            virtual ~IReader() = default;
+
+            virtual const std::string & name() const = 0;
+            virtual const std::string & type() const = 0;
+
+            virtual std::any read (pn_data_t *) const = 0;
+            virtual std::string readString (pn_data_t *) const = 0;
+
+            virtual std::unique_ptr<IValue> dump(
+                    const std::string &,
+                    pn_data_t *,
+                    const SchemaType &) const = 0;
+
+            virtual std::unique_ptr<IValue> dump(
+                    pn_data_t *,
+                    const SchemaType &) const = 0;
+
+    };
+
+}
+
+/******************************************************************************/