Add dual TS3/TS6 protocol support with auto-detection

The @honeybbq/teamspeak-client library already handles TS6 license block
type 8 (Ts5Server) in its handshake, so voice connections work with both
TS3 and TS6 servers. This commit adds the surrounding infrastructure:

- protocol-detect.ts: Auto-detect server type by probing TS3 ServerQuery
  (port 10011) and TS6 HTTP Query (port 10080) in parallel
- http-query.ts: TS6 HTTP Query client replacing the raw-TCP ServerQuery
  that TS6 servers no longer support (ports 10080/10443)
- client.ts: Protocol-aware connection with auto-detection, TS6 HTTP
  Query setup, and forced protocol override option
- manager.ts: Pass through serverProtocol and ts6ApiKey config options
- connection.ts: Mark legacy TS3 ServerQuery as deprecated for TS6

https://claude.ai/code/session_016WhH58avUD9xy2dgADJgTh

src/ts-protocol/protocol-detect.test.ts

@@ -0,0 +1,23 @@
+import { describe, it, expect } from "vitest";
+import {
+  detectServerProtocol,
+  type ServerProtocol,
+  type ProtocolDetectResult,
+} from "./protocol-detect.js";
+
+describe("protocol-detect", () => {
+  it("returns unknown for unreachable hosts", async () => {
+    const result = await detectServerProtocol("192.0.2.1", 9987, 1000);
+    expect(result.protocol).toBe("unknown");
+    expect(result.queryPort).toBeNull();
+    expect(result.voicePort).toBe(9987);
+  });
+
+  it("result shape matches ProtocolDetectResult interface", async () => {
+    const result = await detectServerProtocol("127.0.0.1", 9987, 500);
+    expect(result).toHaveProperty("protocol");
+    expect(result).toHaveProperty("queryPort");
+    expect(result).toHaveProperty("voicePort");
+    expect(["ts3", "ts6", "unknown"]).toContain(result.protocol);
+  });
+});