cmake: add /bigobj for MSVC (fixes C1128 on stable-diffusion.cpp)

With the LTX-2 additions, the stable-diffusion.cpp translation unit exceeds
MSVC's COFF 2^16 section limit and fails to compile on Windows with fatal
error C1128. /bigobj raises the limit; clang/gcc are unaffected.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: aegioscy

CMakeLists.txt

@@ -16,6 +16,11 @@ if (MSVC)
         $<$<COMPILE_LANGUAGE:C>:/utf-8>
         $<$<COMPILE_LANGUAGE:CXX>:/MP>
         $<$<COMPILE_LANGUAGE:CXX>:/utf-8>
+        # stable-diffusion.cpp is a large translation unit; with the LTX-2
+        # additions it exceeds the COFF 2^16 section limit, so MSVC needs
+        # /bigobj (clang/gcc have no equivalent limit). Fatal error C1128.
+        $<$<COMPILE_LANGUAGE:C>:/bigobj>
+        $<$<COMPILE_LANGUAGE:CXX>:/bigobj>
     )
 endif()