Add __all__ (#13704)

stubs/pyserial/@tests/stubtest_allowlist_win32.txt

@@ -1,6 +1,3 @@
-# TODO: missing from stub
-serial.win32.__all__
-
 # Error: failed to import
 # =======================
 serial.serialposix  # Posix only

stubs/pyserial/serial/win32.pyi

@@ -166,3 +166,88 @@ if sys.platform == "win32":
         OffsetHigh: _CField[Incomplete, Incomplete, Incomplete]
 
     PVOID: TypeAlias = c_void_p
+
+    __all__ = [
+        "GetLastError",
+        "MS_CTS_ON",
+        "FILE_ATTRIBUTE_NORMAL",
+        "DTR_CONTROL_ENABLE",
+        "_COMSTAT",
+        "MS_RLSD_ON",
+        "GetOverlappedResult",
+        "SETXON",
+        "PURGE_TXABORT",
+        "PurgeComm",
+        "N11_OVERLAPPED4DOLLAR_48E",
+        "EV_RING",
+        "ONESTOPBIT",
+        "SETXOFF",
+        "PURGE_RXABORT",
+        "GetCommState",
+        "RTS_CONTROL_ENABLE",
+        "_DCB",
+        "CreateEvent",
+        "_COMMTIMEOUTS",
+        "_SECURITY_ATTRIBUTES",
+        "EV_DSR",
+        "EV_PERR",
+        "EV_RXFLAG",
+        "OPEN_EXISTING",
+        "DCB",
+        "FILE_FLAG_OVERLAPPED",
+        "EV_CTS",
+        "SetupComm",
+        "LPOVERLAPPED",
+        "EV_TXEMPTY",
+        "ClearCommBreak",
+        "LPSECURITY_ATTRIBUTES",
+        "SetCommBreak",
+        "SetCommTimeouts",
+        "COMMTIMEOUTS",
+        "ODDPARITY",
+        "EV_RLSD",
+        "GetCommModemStatus",
+        "EV_EVENT2",
+        "PURGE_TXCLEAR",
+        "EV_BREAK",
+        "EVENPARITY",
+        "LPCVOID",
+        "COMSTAT",
+        "ReadFile",
+        "PVOID",
+        "_OVERLAPPED",
+        "WriteFile",
+        "GetCommTimeouts",
+        "ResetEvent",
+        "EV_RXCHAR",
+        "LPCOMSTAT",
+        "ClearCommError",
+        "ERROR_IO_PENDING",
+        "EscapeCommFunction",
+        "GENERIC_READ",
+        "RTS_CONTROL_HANDSHAKE",
+        "OVERLAPPED",
+        "DTR_CONTROL_HANDSHAKE",
+        "PURGE_RXCLEAR",
+        "GENERIC_WRITE",
+        "LPDCB",
+        "CreateEventW",
+        "SetCommMask",
+        "EV_EVENT1",
+        "SetCommState",
+        "LPVOID",
+        "CreateFileW",
+        "LPDWORD",
+        "EV_RX80FULL",
+        "TWOSTOPBITS",
+        "LPCOMMTIMEOUTS",
+        "MAXDWORD",
+        "MS_DSR_ON",
+        "MS_RING_ON",
+        "N11_OVERLAPPED4DOLLAR_484DOLLAR_49E",
+        "EV_ERR",
+        "ULONG_PTR",
+        "CreateFile",
+        "NOPARITY",
+        "CloseHandle",
+    ]