[MSCTFIME][SDK][USER32] Add msctfime.ime (stub) (#6141)

## Overview
1. msctfime.ime is an IME file interface
  for new-style IMEs a.k.a. "Text Input
  Processors" (TIPs).
2. msctfime.ime is loaded as old-style
  IME file at ImmLoadLayout in specific
  condition.
3. msctfime.ime communicates with
  the current TIP (This feature is not
  implemented yet).

## Proposed changes
- Add msctfime module at dll/ime/msctfime.
- The functions in this module are currently
  stub.
- Move IME file interface declarations from
  <imm.h> to <ddk/immdev.h>.
- Modify ImmNotifyIME, NotifyIME, and
  ImeProcessKey prototypes for x64
  compliance.
CORE-19360

sdk/include/ddk/immdev.h

@@ -341,6 +341,115 @@ C_ASSERT(sizeof(CLIENTIMC) == 0x34);
 #define CLIENTIMC_DISABLEIME 0x80
 #define CLIENTIMC_UNKNOWN2 0x100
 
+/* IME file interface */
+
+BOOL WINAPI
+ImeInquire(
+    _Out_ LPIMEINFO lpIMEInfo,
+    _Out_ LPWSTR lpszWndClass,
+    _In_ DWORD dwSystemInfoFlags);
+
+DWORD WINAPI
+ImeConversionList(
+    _In_ HIMC hIMC,
+    _In_ LPCWSTR lpSrc,
+    _Out_ LPCANDIDATELIST lpDst,
+    _In_ DWORD dwBufLen,
+    _In_ UINT uFlag);
+
+BOOL WINAPI
+ImeRegisterWord(
+    _In_ LPCWSTR lpszReading,
+    _In_ DWORD dwStyle,
+    _In_ LPCWSTR lpszString);
+
+BOOL WINAPI
+ImeUnregisterWord(
+    _In_ LPCWSTR lpszReading,
+    _In_ DWORD dwStyle,
+    _In_ LPCWSTR lpszString);
+
+UINT WINAPI
+ImeGetRegisterWordStyle(
+    _In_ UINT nItem,
+    _Out_ LPSTYLEBUFW lpStyleBuf);
+
+UINT WINAPI
+ImeEnumRegisterWord(
+    _In_ REGISTERWORDENUMPROCW lpfnEnumProc,
+    _In_opt_ LPCWSTR lpszReading,
+    _In_ DWORD dwStyle,
+    _In_opt_ LPCWSTR lpszString,
+    _In_opt_ LPVOID lpData);
+
+BOOL WINAPI
+ImeConfigure(
+    _In_ HKL hKL,
+    _In_ HWND hWnd,
+    _In_ DWORD dwMode,
+    _Inout_opt_ LPVOID lpData);
+
+BOOL WINAPI
+ImeDestroy(
+    _In_ UINT uReserved);
+
+LRESULT WINAPI
+ImeEscape(
+    _In_ HIMC hIMC,
+    _In_ UINT uEscape,
+    _Inout_opt_ LPVOID lpData);
+
+BOOL WINAPI
+ImeProcessKey(
+    _In_ HIMC hIMC,
+    _In_ UINT uVirKey,
+    _In_ LPARAM lParam,
+    _In_ CONST LPBYTE lpbKeyState);
+
+BOOL WINAPI
+ImeSelect(
+    _In_ HIMC hIMC,
+    _In_ BOOL fSelect);
+
+BOOL WINAPI
+ImeSetActiveContext(
+    _In_ HIMC hIMC,
+    _In_ BOOL fFlag);
+
+UINT WINAPI
+ImeToAsciiEx(
+    _In_ UINT uVirKey,
+    _In_ UINT uScanCode,
+    _In_ CONST LPBYTE lpbKeyState,
+    _Out_ LPTRANSMSGLIST lpTransMsgList,
+    _In_ UINT fuState,
+    _In_ HIMC hIMC);
+
+BOOL WINAPI
+NotifyIME(
+    _In_ HIMC hIMC,
+    _In_ DWORD dwAction,
+    _In_ DWORD dwIndex,
+    _In_ DWORD_PTR dwValue);
+
+BOOL WINAPI
+ImeSetCompositionString(
+    _In_ HIMC hIMC,
+    _In_ DWORD dwIndex,
+    _In_opt_ LPCVOID lpComp,
+    _In_ DWORD dwCompLen,
+    _In_opt_ LPCVOID lpRead,
+    _In_ DWORD dwReadLen);
+
+DWORD WINAPI
+ImeGetImeMenuItems(
+    _In_ HIMC hIMC,
+    _In_ DWORD dwFlags,
+    _In_ DWORD dwType,
+    _Inout_opt_ LPIMEMENUITEMINFOW lpImeParentMenu,
+    _Inout_opt_ LPIMEMENUITEMINFOW lpImeMenu,
+    _In_ DWORD dwSize);
+
 #ifdef __cplusplus
 } // extern "C"
 #endif