feat: Modify gst crate to add lot of more granularity

gst/src/pad.rs

@@ -20,6 +20,16 @@ impl Pad {
             inner: ghost_pad.upcast(),
         })
     }
+
+    pub fn link(&self, peer: &Pad) -> Result<()> {
+        use gstreamer::prelude::*;
+        self.inner
+            .link(&peer.inner)
+            .change_context(Error)
+            .attach("Failed to link pads")?;
+        Ok(())
+    }
+
     pub fn activate(&self, activate: bool) -> Result<()> {
         use gstreamer::prelude::*;
         self.inner