add file.create_memory_device, app.create_memory_device

src/logic/scripting/lua/libs/libapp.cpp

@@ -1,6 +1,21 @@
 #include "api_lua.hpp"
 
+#include "io/io.hpp"
+#include "io/devices/MemoryDevice.hpp"
+
+static int l_create_memory_device(lua::State* L) {
+    auto name = lua::require_string(L, 1);
+    if (io::get_device(name)) {
+        throw std::runtime_error(
+            "entry-point '" + std::string(name) + "' is already used"
+        );
+    }
+    io::set_device(name, std::make_unique<io::MemoryDevice>());
+    return 0;
+}
+
 const luaL_Reg applib[] = {
+    {"create_memory_device", lua::wrap<l_create_memory_device>},
     // see libcore.cpp an stdlib.lua
     {nullptr, nullptr}
 };