add wsSend to connection

[cs01]

C bridge (lws-bridge.c/h)

• Added ws_format_conn_id() helper that formats a uv_tcp_t* pointer as a hex string
• Expanded evt_mem from 16→24 bytes in all 3 event builders (open, message, close) to fit evt[2] = connId
• Added lws_bridge_ws_send_to() that parses the hex connId, verifies it's in g_ws_conns, and sends a frame

Codegen

• http-server.ts: Added declare void @lws_bridge_ws_send_to + generateWsSendToFunction() IR wrapper
• calls.ts: Added wsSend dispatch after wsBroadcast
• generator-context.ts: Added generateWsSend to interface + base stub; renamed usesMongoose → usesHttpServer
• llvm-generator.ts: Renamed field/getter/setter, added generateWsSend() impl, pushed generateWsSendToFunction() when wsHandler is registered

Cleanup

• Deleted dead mongoose.ts
• Updated compiler.ts and native-compiler-lib.ts to use usesHttpServer
• Added connId: string to WsEvent in example and test fixture
• Updated docs with connId field and wsSend(connId, message) section
• Removed "mongoose" from network test description