prevent the server from swallowing exceptions in debug mode

So it's easier to catch them inside a debugger.

examples/server/CMakeLists.txt

@@ -1,6 +1,11 @@
 set(TARGET server)
 include_directories(${CMAKE_CURRENT_SOURCE_DIR})
 add_executable(${TARGET} server.cpp json.hpp httplib.h)
+target_compile_definitions(${TARGET} PRIVATE
+    $<$<CONFIG:Debug>:
+        CPPHTTPLIB_NO_EXCEPTIONS=1
+    >
+)
 target_link_libraries(${TARGET} PRIVATE common llama ${CMAKE_THREAD_LIBS_INIT})
 target_compile_features(${TARGET} PRIVATE cxx_std_11)
 if(TARGET BUILD_INFO)