feat: Restructure the gst parent<->child relations

gst/src/lib.rs

@@ -3,10 +3,11 @@ pub mod bus;
 pub mod caps;
 pub mod element;
 pub mod errors;
-pub mod isa;
 pub mod pad;
 pub mod pipeline;
 pub mod plugins;
+#[macro_use]
+pub mod wrapper;
 
 pub use bin::*;
 pub use bus::*;
@@ -18,6 +19,7 @@ pub use plugins::*;
 
 pub(crate) mod priv_prelude {
     pub use crate::errors::*;
+    pub use crate::wrapper::*;
     pub use crate::*;
     pub use gstreamer::prelude::*;
     #[track_caller]