Include simulations.json in docs install

Add simulations.json to the CMake install list so it gets
deployed to mflowcode.github.io alongside index.html.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: sbryngelson

CMakeLists.txt

@@ -834,6 +834,7 @@ if (MFC_DOCUMENTATION)
 
     install(FILES       "${CMAKE_CURRENT_SOURCE_DIR}/docs/index.html"
                         "${CMAKE_CURRENT_SOURCE_DIR}/docs/404.html"
+                        "${CMAKE_CURRENT_SOURCE_DIR}/docs/simulations.json"
             DESTINATION "docs/mfc")
 endif()