New cpp folder structure

Signed-off-by: Alexander Borsuk <me@alex.bio>

libs/platform/secure_storage_qt.cpp

@@ -0,0 +1,21 @@
+#include "platform/secure_storage.hpp"
+#include "platform/settings.hpp"
+
+namespace platform
+{
+void SecureStorage::Save(std::string const & key, std::string const & value)
+{
+  settings::Set(key, value);
+}
+
+bool SecureStorage::Load(std::string const & key, std::string & value)
+{
+  bool const result = settings::Get(key, value);
+  return result && !value.empty();
+}
+
+void SecureStorage::Remove(std::string const & key)
+{
+  settings::Set(key, std::string());
+}
+}  // namespace platform