Add smallpt example notebook running through xeus-cpp-lite (#299)

* Add smallpt example notebook running through xeus-cpp-lite

* address reviews

Author: anutosh491

.github/workflows/deploy-github-page.yml

@@ -74,6 +74,7 @@ jobs:
               --XeusAddon.prefix=${{ env.PREFIX }} \
               --contents README.md \
               --contents notebooks/xeus-cpp-lite-demo.ipynb \
+              --contents notebooks/smallpt.ipynb \
               --contents notebooks/images/marie.png \
               --contents notebooks/audio/audio.wav \
               --output-dir dist

CMakeLists.txt

@@ -436,6 +436,7 @@ if(EMSCRIPTEN)
     xeus_wasm_compile_options(xcpp)
     xeus_wasm_link_options(xcpp "web,worker")
     target_link_options(xcpp
+        PUBLIC "SHELL: -s USE_SDL=2"
         PUBLIC "SHELL: --preload-file ${SYSROOT_PATH}/include@/include"
         #PUBLIC "SHELL: --preload-file ${CMAKE_INSTALL_PREFIX}${XEUS_CPP_RESOURCE_DIR}@${XEUS_CPP_RESOURCE_DIR}"
         PUBLIC "SHELL: --preload-file ${XEUS_CPP_DATA_DIR}@/share/xeus-cpp"