[MSHTA] Implement MSHTA.exe (#577) CORE-12813

Implement mshta.exe. It links directly to the function RunHTMLApplication in mshtml and passes the file name and other optional arguments along. While the function is unimplemented in mshtml, it's a start.

[MSHTML] Add ADD_IMPORTLIB to CMakeLists so mshta can link to mshtml.
[BOOTDATA] Add the association information for mshta.exe to the registry.

base/applications/mshta/main.c

@@ -0,0 +1,18 @@
+/*
+ * PROJECT:     ReactOS HTML Application Host
+ * LICENSE:     GPL-2.0+ (https://spdx.org/licenses/GPL-2.0+)
+ * PURPOSE:     Forwards HTA application information to mshtml
+ * COPYRIGHT:   Copyright 2017-2018 Jared Smudde(computerwhiz02@hotmail.com)
+ */
+
+#include <windef.h>
+#include <winbase.h>
+#include <winuser.h>
+#include <mshtml.h>
+
+extern DWORD WINAPI RunHTMLApplication(HINSTANCE hinst, HINSTANCE hPrevInst, LPSTR szCmdLine, int nCmdShow);
+
+int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, LPSTR cmdline, int cmdshow)
+{
+    return RunHTMLApplication(hInst, hPrevInst, cmdline, cmdshow);
+}