Src, move out of ./rust, add missing wip files

Moves file contents out of ./rust since I'm planning to go with rust for
the backend and the lexicons will be used for codegen soon anyways.

I also added extra files that have been in the works that I have been
accidentally sprinkling into main.rs already. God forbid I need to
cherry-pick anything from so far back in the history.

It will make git blame ugly though.

src/router.rs

@@ -0,0 +1,61 @@
+use crate::{
+  atproto::Nsid,
+  router::xrpc::{
+    XrpcEndpoint,
+    XrpcHandler,
+    QueryInput,
+    ProcedureInput,
+  }
+};
+use axum::Router as AxumRouter;
+use core::net::SocketAddr;
+use std::net::{IpAddr, Ipv4Addr};
+use tokio::net::TcpListener;
+
+pub struct Router {
+  addr: SocketAddr,
+  router: AxumRouter,
+}
+
+// In case server ever needs to support more than just XRPC
+pub enum Endpoint {
+  Xrpc(XrpcEndpoint),
+}
+impl Endpoint {
+  pub fn new_xrpc_query<Q>(nsid: Nsid, query: Q) -> Self
+  where
+    Q: XrpcHandler<QueryInput> + Clone
+  {
+    Endpoint::Xrpc(XrpcEndpoint::new_query(nsid,query))
+  }
+  pub fn new_xrpc_procedure<P>(nsid: Nsid, procedure: P) -> Self
+  where
+    P: XrpcHandler<ProcedureInput> + Clone
+  {
+    Endpoint::Xrpc(XrpcEndpoint::new_procedure(nsid,procedure))
+  }
+}
+
+pub mod xrpc;
+
+impl Router {
+  pub fn new() -> Self {
+    let mut router = AxumRouter::new();
+    router = XrpcEndpoint::not_implemented().add_to_router(router);
+    let addr = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127,0,0,1)), 6702);
+    Router { router, addr }
+  }
+
+  pub fn add_endpoint(mut self, endpoint: Endpoint) -> Self {
+    match endpoint {
+      Endpoint::Xrpc(ep) => self.router = ep.add_to_router(self.router),
+    };
+    self
+  }
+
+  pub async fn serve(self) {
+    let listener = TcpListener::bind(self.addr).await.unwrap();
+
+    axum::serve(listener, self.router).await.unwrap();
+  }
+}