feat(libhttp): integrate WebSocket support into HttpServer

Merge WebSocketServer functionality into HttpServer so a single port can
serve both HTTP(S) and WebSocket(S) endpoints while preserving full backward
compatibility for existing HTTP interfaces.

Key changes:
- Add WebSocket route registration: ws(), onWsConnect(), onWsDisconnect()
- Add client management: sendToWsClient(), broadcastWs(), disconnectWsClient()
- Rewrite Session class using beast::tcp_stream for unified HTTP/WS handling
- Support automatic ws:// and wss:// upgrades on HTTP/HTTPS ports
- Thread-safe message queue with asio::post for cross-thread sends
- Update Makefile to link OpenSSL and pthread for TLS/WebSocket support
- Add test_server.cpp demonstrating HTTP + WebSocket mixed usage

libhttp/Makefile

@@ -5,9 +5,9 @@ INSTL_TDIR := /lib
 INCLU_TDIR := /usr/include
 INCLU_SDIR := inc
 CPP := g++
-INCS := -I inc
+INCS := -I inc -I/opt/homebrew/include
 CPPFLAGS := --std=c++20 -O3 -pipe -Wall -Werror
-LIBS :=
+LIBS := -L/opt/homebrew/lib -lssl -lcrypto -lpthread
 BUILD_TDIR := build
 $(shell mkdir -p $(BUILD_TDIR))