chore: import upstream snapshot with attribution

examples/cpp/spawn_viewer/CMakeLists.txt

@@ -0,0 +1,24 @@
+cmake_minimum_required(VERSION 3.16...3.27)
+
+# If you use the example outside of the Rerun SDK you need to specify
+# where the rerun_c build is to be found by setting the `RERUN_CPP_URL` variable.
+# This can be done by passing `-DRERUN_CPP_URL=<path to rerun_sdk_cpp zip>` to cmake.
+if(DEFINED RERUN_REPOSITORY)
+    add_executable(example_spawn_viewer main.cpp)
+    rerun_strict_warning_settings(example_spawn_viewer)
+else()
+    project(example_spawn_viewer LANGUAGES CXX)
+
+    add_executable(example_spawn_viewer main.cpp)
+
+    # Set the path to the rerun_c build.
+    set(RERUN_CPP_URL "https://github.com/rerun-io/rerun/releases/latest/download/rerun_cpp_sdk.zip" CACHE STRING "URL to the rerun_cpp zip.")
+
+    # Download the rerun_sdk
+    include(FetchContent)
+    FetchContent_Declare(rerun_sdk URL ${RERUN_CPP_URL})
+    FetchContent_MakeAvailable(rerun_sdk)
+endif()
+
+# Link against rerun_sdk.
+target_link_libraries(example_spawn_viewer PRIVATE rerun_sdk)

examples/cpp/spawn_viewer/README.md

@@ -0,0 +1,13 @@
+<!--[metadata]
+title = "Spawn Viewer"
+tags = ["Spawn"]
+-->
+
+
+Shows how to spawn a new Rerun Viewer process ready to listen for gRPC connections using an executable available in PATH.
+
+```bash
+cmake .
+cmake --build . --target spawn_viewer
+./examples/cpp/spawn_viewer/spawn_viewer
+```

examples/cpp/spawn_viewer/main.cpp

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+#include <rerun.hpp>
+
+int main() {
+    rerun::spawn().exit_on_failure();
+}