feat(gst): enhance GStreamer integration with new modules and improved API

This commit introduces significant enhancements to the GStreamer integration by:
- Adding new modules for bins, caps, elements, pads, and plugins
- Implementing a more ergonomic API with helper methods like play(), pause(), ready()
- Adding support for various GStreamer plugins including app, autodetect, playback, and videoconvertscale
- Improving error handling with better context attachment
- Updating dependencies to latest versions including gstreamer-video 0.24.4
- Refactoring existing code to use modern Rust patterns and features

gst/src/plugins/autodetect/autovideosink.rs

@@ -0,0 +1,30 @@
+use crate::*;
+
+#[repr(transparent)]
+pub struct AutoVideoSink {
+    inner: gstreamer::Element,
+}
+
+impl IsElement for AutoVideoSink {
+    fn as_element(&self) -> &Element {
+        unsafe { core::mem::transmute(&self.inner) }
+    }
+
+    fn into_element(self) -> Element {
+        Element { inner: self.inner }
+    }
+}
+
+impl Sink for AutoVideoSink {}
+
+impl AutoVideoSink {
+    pub fn new(name: impl AsRef<str>) -> Result<Self> {
+        use gstreamer::prelude::*;
+        let element = gstreamer::ElementFactory::make("autovideosink")
+            .name(name.as_ref())
+            .build()
+            .change_context(Error)
+            .attach("Failed to create autovideosink element")?;
+        Ok(AutoVideoSink { inner: element })
+    }
+}