⭐ feat: Migrate from WebSocket to libp2p for peer-to-peer connectivity (#286)

## Description
Whew, some stuff is still not re-implemented, but it's working!

Rabbit's gonna explode with the amount of changes I reckon 😅



<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

- **New Features**
- Introduced a peer-to-peer relay system using libp2p with enhanced
stream forwarding, room state synchronization, and mDNS peer discovery.
- Added decentralized room and participant management, metrics
publishing, and safe, size-limited, concurrent message streaming with
robust framing and callback dispatching.
- Implemented asynchronous, callback-driven message handling over custom
libp2p streams replacing WebSocket signaling.
- **Improvements**
- Migrated signaling and stream protocols from WebSocket to libp2p,
improving reliability and scalability.
- Simplified configuration and environment variables, removing
deprecated flags and adding persistent data support.
- Enhanced logging, error handling, and connection management for better
observability and robustness.
- Refined RTP header extension registration and NAT IP handling for
improved WebRTC performance.
- **Bug Fixes**
- Improved ICE candidate buffering and SDP negotiation in WebRTC
connections.
  - Fixed NAT IP and UDP port range configuration issues.
- **Refactor**
- Modularized codebase, reorganized relay and server logic, and removed
deprecated WebSocket-based components.
- Streamlined message structures, removed obsolete enums and message
types, and simplified SafeMap concurrency.
- Replaced WebSocket signaling with libp2p stream protocols in server
and relay components.
- **Chores**
- Updated and cleaned dependencies across Go, Rust, and JavaScript
packages.
  - Added `.gitignore` for persistent data directory in relay package.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

---------

Co-authored-by: DatCaptainHorse <DatCaptainHorse@users.noreply.github.com>
Co-authored-by: Philipp Neumann <3daquawolf@gmail.com>

packages/server/src/nestrisink/mod.rs

@@ -1,4 +1,4 @@
-use crate::websocket::NestriWebSocket;
+use crate::p2p::p2p::NestriConnection;
 use gst::glib;
 use gst::subclass::prelude::*;
 use gstrswebrtc::signaller::Signallable;
@@ -11,15 +11,20 @@ glib::wrapper! {
 }
 
 impl NestriSignaller {
-    pub fn new(nestri_ws: Arc<NestriWebSocket>, wayland_src: Arc<gst::Element>) -> Self {
+    pub async fn new(
+        room: String,
+        nestri_conn: NestriConnection,
+        wayland_src: Arc<gst::Element>,
+    ) -> Result<Self, Box<dyn std::error::Error>> {
         let obj: Self = glib::Object::new();
-        obj.imp().set_nestri_ws(nestri_ws);
+        obj.imp().set_stream_room(room);
+        obj.imp().set_nestri_connection(nestri_conn).await?;
         obj.imp().set_wayland_src(wayland_src);
-        obj
+        Ok(obj)
     }
 }
 impl Default for NestriSignaller {
     fn default() -> Self {
-        panic!("Cannot create NestriSignaller without NestriWebSocket");
+        panic!("Cannot create NestriSignaller without NestriConnection and WaylandSrc");
     }
 }