Add HTTP/SSE action examples and browser demos #618

Job	Run time
build-and-test / build (arm64, kilted)	6m 47s
build-and-test / build (arm64, jazzy)	7m 37s
build-and-test / build (arm64, rolling, 26.X, ubuntu:resolute, https://github.com/ros2/ros2/releases/download/rele...	12m 47s
build-and-test / build (arm64, lyrical)	7m 52s
build-and-test / build (arm64, humble)	6m 22s
	41m 25s

Navigation Menu