Add set_guard_condition_callback api

Move apis - Add constness

Use or discard previous events: Guard conditions

Rename to set_events_executor_callback

Rename Event_callback -> ExecutorEventCallback

update name

Add events support

void return on set_events_executor_callback

Revert "void return on set_events_executor_callback"

Rename ExecutorEventCallback -> EventsExecutorCallback

Rename set_events_executor_callback->set_listener_callback

Use data types when setting callbacks

Move rcutils/executor_event_types.h to rmw/

rename event types

Rename executor_context->callback_context

Rename callback_context->user_data

Reorder APIs arguments

rename rmw_listener_cb_t->rmw_listener_callback_t

use void * to pass executor ptr

Rework executor callback data

Use RMW renamed file

Signed-off-by: Alberto Soragna <asoragna@irobot.com>

Signed-off-by: Mauro Passerino <mpasserino@irobot.com>

Signed-off-by: Mauro Passerino <mpasserino@irobot.com>

Signed-off-by: William Woodall <william@osrfoundation.org>

Signed-off-by: Alberto Soragna <alberto.soragna@gmail.com>

allow rmw event callback to be NULL to unset them

Signed-off-by: Mauro Passerino <mpasserino@irobot.com>

…-actions-support

Add APIs to support actions on EventsExecutor

…-executor

…xecutor

Signed-off-by: William Woodall <william@osrfoundation.org>