Display Nodes/Ports/Links obtained from pipewire server

src/view/port.rs

@@ -0,0 +1,16 @@
+/// Graphical representation of a pipewire port.
+pub struct Port {
+    pub(super) widget: gtk::Button,
+    pub id: u32,
+    pub direction: pipewire::port::Direction,
+}
+
+impl Port {
+    pub fn new(id: u32, name: &str, direction: pipewire::port::Direction) -> Self {
+        Self {
+            widget: gtk::Button::with_label(name),
+            id,
+            direction
+        }
+    }
+}