feat: Migration framework (#1768)

This PR implemented the migration framework, which contains the command
line interface to execute migration and helps to migrate data easily.
Please read README.md for more information about this framework.

src/migration/impl/Spec.hpp

@@ -0,0 +1,56 @@
+
+//------------------------------------------------------------------------------
+/*
+    This file is part of clio: https://github.com/XRPLF/clio
+    Copyright (c) 2022-2024, the clio developers.
+
+    Permission to use, copy, modify, and distribute this software for any
+    purpose with or without fee is hereby granted, provided that the above
+    copyright notice and this permission notice appear in all copies.
+
+    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
+    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+    ANY  SPECIAL,  DIRECT,  INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
+    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+//==============================================================================
+
+#pragma once
+
+#include "util/newconfig/ObjectView.hpp"
+
+#include <boost/asio/spawn.hpp>
+
+#include <memory>
+#include <string>
+
+namespace migration::impl {
+
+/**
+ * @brief The migrator specification concept
+ */
+template <typename T, typename Backend>
+concept MigratorSpec = requires(std::shared_ptr<Backend> const& backend, util::config::ObjectView const& cfg) {
+    // Check that 'name' exists and is a string
+    { T::name } -> std::convertible_to<std::string>;
+
+    // Check that 'description' exists and is a string
+    { T::description } -> std::convertible_to<std::string>;
+
+    // Check that the migrator specifies the backend type it supports
+    typename T::Backend;
+
+    // Check that 'runMigration' exists and is callable
+    { T::runMigration(backend, cfg) } -> std::same_as<void>;
+};
+
+/**
+ * @brief used by variadic template to check all migrators are MigratorSpec
+ */
+template <typename... Types>
+concept AllMigratorSpec = (MigratorSpec<Types, typename Types::Backend> && ...);
+
+}  // namespace migration::impl