feature: add gpu ram collector for nvidia feature flag (#794)

* add gpu ram collector for nvidia feature flag

* add row for TX in basic layout

* size gpu point_vec

* use vec for mem basic widget drawing

* remove to_owned

* code review: change mem tuple to struct with cfg fields, rename mem_basic ratio and use vec macro for layout

* build on freebsd

src/bin/main.rs

@@ -210,6 +210,11 @@ fn main() -> Result<()> {
                                 app.converted_data.arc_data =
                                     convert_arc_data_points(&app.data_collection);
                             }
+                            #[cfg(feature = "gpu")]
+                            {
+                                app.converted_data.gpu_data =
+                                    convert_gpu_data(&app.data_collection);
+                            }
                             let (memory_labels, swap_labels) =
                                 convert_mem_labels(&app.data_collection);