refactor(log): clarify atlas packing log messages

Update log messages during atlas packing to use clearer wording and
consistent formatting for atlas size output. This improves readability
and makes log output more informative.

Author: reybits

src/ImageList.cpp

@@ -84,8 +84,8 @@ bool cImageList::doPacking(const char* desiredAtlasName, const char* outputResNa
 
     auto packer = AtlasPacker::create(m_images, m_config);
 
-    cLog::Info("Packing:");
-    cLog::Info(" - trying {} x {}.", atlasSize.width, atlasSize.height);
+    cLog::Info("Packing atlas:");
+    cLog::Info(" - size: {} x {}", atlasSize.width, atlasSize.height);
 
     bool done = false;
     do
@@ -98,7 +98,7 @@ bool cImageList::doPacking(const char* desiredAtlasName, const char* outputResNa
                 return false;
             }
 
-            cLog::Info(" - trying {} x {}.", atlasSize.width, atlasSize.height);
+            cLog::Info(" - size: {} x {}", atlasSize.width, atlasSize.height);
         }
         else
         {