add struct Biome & move generator-related scripting to scripting_world_generation.cpp

src/logic/scripting/scripting_commons.hpp

@@ -0,0 +1,11 @@
+#pragma once
+
+#include <string>
+#include <filesystem>
+
+namespace scripting {
+    void load_script(const std::filesystem::path& name, bool throwable);
+
+    [[nodiscard]]
+    int load_script(int env, const std::string& type, const std::filesystem::path& file);
+}