Add TCP-over-WebSocket relay client for Minecraft

- Implemented Win64LceLiveRelay.h and Win64LceLiveSignaling.cpp to facilitate TCP-over-WebSocket communication for Minecraft, allowing game traffic to route through the LCELive relay server when direct TCP is blocked.
- Introduced signaling mechanisms for host and joiner connections, including session management and candidate exchange.
- Added logging functionality in Windows_Log.cpp and Windows_Log.h for better debugging and session tracking.
- Created build-release.bat script for streamlined build and deployment process, including exclusion of unnecessary files.

Minecraft.Client/Windows64/Windows64_Log.cpp

@@ -0,0 +1,97 @@
+#include "stdafx.h"
+
+#ifdef _WINDOWS64
+
+#include "Windows64_Log.h"
+
+#include <cstdio>
+#include <cstdarg>
+#include <cstring>
+
+namespace LceLog
+{
+
+static FILE* s_logFile = nullptr;
+
+// ---------------------------------------------------------------------------
+// Init — open latest.log (rotating the previous one).
+// ---------------------------------------------------------------------------
+void Init()
+{
+    // Rotate: latest → previous
+    rename("latest.log", "previous.log");
+
+    if (fopen_s(&s_logFile, "latest.log", "w") != 0 || !s_logFile)
+    {
+        s_logFile = nullptr;
+        OutputDebugStringA("[LceLog] Failed to open latest.log\n");
+        return;
+    }
+
+    // Write header so it's easy to tell sessions apart.
+    SYSTEMTIME st = {};
+    GetLocalTime(&st);
+    char header[128];
+    snprintf(header, sizeof(header),
+        "=== LCELive session started %04d-%02d-%02d %02d:%02d:%02d ===\n",
+        st.wYear, st.wMonth, st.wDay,
+        st.wHour, st.wMinute, st.wSecond);
+    fputs(header, s_logFile);
+    fflush(s_logFile);
+}
+
+// ---------------------------------------------------------------------------
+// Shutdown — flush and close.
+// ---------------------------------------------------------------------------
+void Shutdown()
+{
+    if (!s_logFile)
+        return;
+
+    fputs("=== session ended ===\n", s_logFile);
+    fflush(s_logFile);
+    fclose(s_logFile);
+    s_logFile = nullptr;
+}
+
+// ---------------------------------------------------------------------------
+// Write — timestamped log entry.  Safe to call before Init (silently skipped)
+// and from any thread (FILE* writes are internally serialised on MSVC CRT).
+// ---------------------------------------------------------------------------
+void Write(const char* fmt, ...)
+{
+    if (!s_logFile && !IsDebuggerPresent())
+        return;
+
+    // Build timestamp
+    SYSTEMTIME st = {};
+    GetLocalTime(&st);
+    char timeBuf[24];
+    snprintf(timeBuf, sizeof(timeBuf), "%02d:%02d:%02d.%03d",
+        st.wHour, st.wMinute, st.wSecond, st.wMilliseconds);
+
+    // Format the caller's message
+    char msgBuf[2048];
+    va_list args;
+    va_start(args, fmt);
+    vsnprintf(msgBuf, sizeof(msgBuf) - 1, fmt, args);
+    va_end(args);
+    msgBuf[sizeof(msgBuf) - 1] = '\0';
+
+    // Full line: "[HH:MM:SS.mmm] message\n"
+    char line[2048 + 32];
+    snprintf(line, sizeof(line), "[%s] %s\n", timeBuf, msgBuf);
+
+    if (s_logFile)
+    {
+        fputs(line, s_logFile);
+        fflush(s_logFile);      // flush every write — we want to see crashes
+    }
+
+    // Also send to VS Output window when a debugger is attached.
+    OutputDebugStringA(line);
+}
+
+} // namespace LceLog
+
+#endif // _WINDOWS64