organize examples

[stephen-derosa]

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[Copilot]

Pull request overview

This PR reorganizes and (re)introduces multiple LiveKit C++ examples into a clearer folder structure (e.g., logging_levels/basic_usage, hello_livekit/sender, ping_pong/ping) and updates the root build to include them via add_subdirectory(<src> <binary_dir>).

Changes:

• Add new example implementations for simple_joystick, ping_pong, hello_livekit, and logging_levels.
• Add per-example CMakeLists.txt files that build dedicated executables (and small support static libs where needed).
• Update the top-level CMakeLists.txt to reference the new on-disk directory layout.

Reviewed changes

Copilot reviewed 1 out of 35 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
CMakeLists.txt	Switches several examples to add_subdirectory(<nested path> <binary dir>) to match reorganized layout.
simple_joystick/sender/CMakeLists.txt	Builds SimpleJoystickSender plus a small support static library.
simple_joystick/sender/main.cpp	Sender example: connects to a room and sends joystick RPC commands based on keyboard input.
simple_joystick/sender/utils.h	Declares CLI parsing helper for URL/token.
simple_joystick/sender/utils.cpp	Implements CLI parsing with flags/positional/env fallbacks.
simple_joystick/sender/json_utils.h	Declares joystick command struct + JSON serialize/deserialize helpers.
simple_joystick/sender/json_utils.cpp	Implements JSON serialization/deserialization using nlohmann/json.
simple_joystick/receiver/CMakeLists.txt	Builds SimpleJoystickReceiver plus a small support static library.
simple_joystick/receiver/main.cpp	Receiver example: registers an RPC method and prints received joystick commands.
simple_joystick/receiver/utils.h	Declares CLI parsing helper for URL/token.
simple_joystick/receiver/utils.cpp	Implements CLI parsing with flags/positional/env fallbacks.
simple_joystick/receiver/json_utils.h	Declares joystick command struct + JSON serialize/deserialize helpers.
simple_joystick/receiver/json_utils.cpp	Implements JSON serialization/deserialization using nlohmann/json.
ping_pong/ping/CMakeLists.txt	Builds PingPongPing plus a small support static library.
ping_pong/ping/main.cpp	Ping participant: publishes “ping” frames, listens for “pong”, logs latency metrics.
ping_pong/ping/utils.h	Common helpers (env, time, payload conversions) for ping participant.
ping_pong/ping/messages.h	Defines ping/pong message structs and latency metrics struct.
ping_pong/ping/constants.h	Shared constants for track names, identities, JSON keys, and timing.
ping_pong/ping/json_converters.h	Declares JSON conversion functions for ping/pong messages.
ping_pong/ping/json_converters.cpp	Implements JSON conversion for ping/pong messages using nlohmann/json.
ping_pong/pong/CMakeLists.txt	Builds PingPongPong plus a small support static library.
ping_pong/pong/main.cpp	Pong participant: listens for “ping” frames and responds on “pong”.
ping_pong/pong/utils.h	Common helpers (env, time, payload conversions) for pong participant.
ping_pong/pong/messages.h	Defines ping/pong message structs and latency metrics struct.
ping_pong/pong/constants.h	Shared constants for track names, identities, JSON keys, and timing.
ping_pong/pong/json_converters.h	Declares JSON conversion functions for ping/pong messages.
ping_pong/pong/json_converters.cpp	Implements JSON conversion for ping/pong messages using nlohmann/json.
logging_levels/basic_usage/CMakeLists.txt	Builds the LoggingLevelsBasicUsage executable.
logging_levels/basic_usage/main.cpp	Demonstrates SDK log-level control and custom log callbacks.
logging_levels/custom_sinks/CMakeLists.txt	Builds the LoggingLevelsCustomSinks executable.
logging_levels/custom_sinks/main.cpp	Demonstrates custom log sinks (file, JSON, ROS2-stub) using setLogCallback.
hello_livekit/sender/CMakeLists.txt	Builds the HelloLivekitSender executable.
hello_livekit/sender/main.cpp	Publishes synthetic video and a data track.
hello_livekit/receiver/CMakeLists.txt	Builds the HelloLivekitReceiver executable.
hello_livekit/receiver/main.cpp	Subscribes to sender video + data track and logs frame counts.

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