Route preference reads through adapter

src/legacy_preference_storage.cpp

@@ -7,6 +7,46 @@
 
 namespace pp::panopainter {
 
+bool has_legacy_preference(const char* key)
+{
+    return Settings::has(key);
+}
+
+int legacy_integer_preference(const char* key)
+{
+    return Settings::value<Serializer::Integer>(key);
+}
+
+int legacy_integer_preference_or(const char* key, int default_value)
+{
+    return Settings::value_or<Serializer::Integer>(key, default_value);
+}
+
+float legacy_float_preference(const char* key)
+{
+    return Settings::value<Serializer::Float>(key);
+}
+
+float legacy_float_preference_or(const char* key, float default_value)
+{
+    return Settings::value_or<Serializer::Float>(key, default_value);
+}
+
+bool legacy_boolean_preference_or(const char* key, bool default_value)
+{
+    return Settings::value_or<Serializer::Boolean>(key, default_value);
+}
+
+glm::ivec4 legacy_ivec4_preference(const char* key)
+{
+    return Settings::value<Serializer::IVec4>(key);
+}
+
+std::shared_ptr<Serializer::Descriptor> get_legacy_descriptor_preference(const char* key)
+{
+    return Settings::get<Serializer::Descriptor>(key);
+}
+
 void set_legacy_integer_preference(const char* key, int value)
 {
     Settings::set(key, Serializer::Integer(value));