update pack.get_info

doc/en/scripting/builtins/libpack.md

@@ -76,14 +76,14 @@ pack.get_base_packs() -> strings array
 
 Returns the id of all base packages (non-removeable)
 
-```python
+```lua
 pack.get_info(packid: str) -> {
   id: str,
   title: str,
   creator: str,
   description: str,
   version: str,
-  icon: str,
+  icon: str, -- not available in headless mode
   dependencies: optional strings array
 }
 ```

doc/ru/scripting/builtins/libpack.md

@@ -70,7 +70,7 @@ pack.get_info(packid: str) -> {
 	creator: str,
 	description: str,
 	version: str,
-	icon: str,
+	icon: str, -- отсутствует в headless режиме
 	dependencies: опциональный массив строк
 }
 ```

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

@@ -81,25 +81,18 @@ static int l_pack_get_info(
     lua::pushstring(L, pack.version);
     lua::setfield(L, "version");
 
-    auto assets = engine->getAssets();
-    std::string icon = pack.id + ".icon";
-    if (engine->isHeadless()) {
-        if (fs::exists(pack.folder / fs::path("icon.png"))) {
-            icon = pack.folder.u8string() + "/icon.png";
-        } else {
-            icon = "gui/no_icon";
-        }
-    } else {
+    if (!engine->isHeadless()) {
+        auto assets = engine->getAssets();
+        std::string icon = pack.id + ".icon";
         if (!AssetsLoader::loadExternalTexture(
                 assets, icon, {pack.folder / fs::path("icon.png")}
             )) {
             icon = "gui/no_icon";
         }
+        lua::pushstring(L, icon);
+        lua::setfield(L, "icon");
     }
 
-    lua::pushstring(L, icon);
-    lua::setfield(L, "icon");
-
     if (!pack.dependencies.empty()) {
         lua::createtable(L, pack.dependencies.size(), 0);
         for (size_t i = 0; i < pack.dependencies.size(); i++) {