Add SMTG_USE_STATIC_CRT and additional include directories

- Set SMTG_USE_STATIC_CRT=ON to match pluginval's static CRT linking
- Add vst and utility include directories for VST3 SDK module compilation

https://claude.ai/code/session_01AY9chvBEmsCVjNZSUkNcbw

Author: claude

CMakeLists.txt

@@ -56,6 +56,9 @@ endif()
 option(PLUGINVAL_VST3_VALIDATOR "Build with embedded VST3 validator" ON)
 
 if(PLUGINVAL_VST3_VALIDATOR)
+    # Use static CRT on Windows to match pluginval's settings
+    set(SMTG_USE_STATIC_CRT ON CACHE BOOL "" FORCE)
+
     CPMAddPackage(
         NAME vst3sdk
         GITHUB_REPOSITORY steinbergmedia/vst3sdk
@@ -151,7 +154,9 @@ if(PLUGINVAL_VST3_VALIDATOR)
         ${vst3sdk_SOURCE_DIR}/base
         ${vst3sdk_SOURCE_DIR}/public.sdk
         ${vst3sdk_SOURCE_DIR}/public.sdk/source
+        ${vst3sdk_SOURCE_DIR}/public.sdk/source/vst
         ${vst3sdk_SOURCE_DIR}/public.sdk/source/vst/hosting
+        ${vst3sdk_SOURCE_DIR}/public.sdk/source/vst/utility
     )
 endif()