implemented the first version of statement_cache

source/orm/sql/interface/statement_proxy.cpp

@@ -0,0 +1,17 @@
+#include "matador/sql/interface/statement_proxy.hpp"
+
+namespace matador::sql {
+statement_proxy::statement_proxy(std::unique_ptr<statement_impl>&& stmt)
+: statement_(std::move(stmt)){}
+
+void statement_proxy::bind(const size_t pos, const char* value, const size_t size) const {
+  statement_->bind(pos, value, size);
+}
+void statement_proxy::bind(const size_t pos, std::string& val, const size_t size) const {
+  statement_->bind(pos, val, size);
+}
+
+void statement_proxy::reset() const {
+  statement_->reset();
+}
+}