Introduce authentication framework with AuthConfig, AuthGate, and Authenticator classes, alongside comprehensive tests for rules, modes, and schemes.

src/test/java/dev/coph/nextusweb/server/websocket/WebSocketHandlerTest.java

@@ -13,7 +13,7 @@ class WebSocketHandlerTest {
     void defaultMethodsDoNotThrow() {
         WebSocketHandler handler = new WebSocketHandler() {};
         EmbeddedChannel ch = new EmbeddedChannel();
-        WebSocketSession session = new WebSocketSession(ch, "/ws", Map.of());
+        WebSocketSession session = new WebSocketSession(ch, "/ws", Map.of(), null);
         assertDoesNotThrow(() -> handler.onOpen(session));
         assertDoesNotThrow(() -> handler.onMessage(session, "msg"));
         assertDoesNotThrow(() -> handler.onBinary(session, new byte[]{1}));