tried making naming more uniform and implemented most of the opengl managers

source/assets/data_loaders/point_cloud_loader.cpp

@@ -0,0 +1,40 @@
+#include "assets/data_loaders/point_cloud_loader.hpp"
+
+std::error_code assets::point_cloud_loader::prefetch(
+	const loader_id_type loader_id,
+	const ztu::string_list& directories,
+	prefetch_queue& queue
+) {
+	return this->invoke_with_matching_loader(
+		loader_id,
+		[&](auto& loader)
+		{
+			return loader.prefetch(
+				directories,
+				queue
+			);
+		}
+	);
+}
+
+std::error_code assets::point_cloud_loader::load(
+	const loader_id_type loader_id,
+	const ztu::string_list& directories,
+	point_cloud_store& store,
+	point_cloud_prefetch_lookup& id_lookup,
+	const bool pedantic
+) {
+	return this->invoke_with_matching_loader(
+		loader_id,
+		[&](auto& loader)
+		{
+			return loader.load(
+				m_buffer,
+				directories,
+				store,
+				id_lookup,
+				pedantic
+			);
+		}
+	);
+}