Add Zenoh Pico Examples

[uupks]

This add Zenoh Pico examples for:

• Topics listener
• Topics talker
• Services client
• Services server
• Actions client
• Actions server

Resolves #70
Main PR: #80

There are two fields named with sequence in Fibonacci.idl file, which causes idlc compile failed, so it can't support
Actions client demo for now.

module example_interfaces {
  module action {
    @verbatim (language="comment", text=
      "Goal")
    struct Fibonacci_Goal {
      int32 order;
    };
    @verbatim (language="comment", text=
      "Result")
    struct Fibonacci_Result {
      sequence<int32> sequence;
    };
    @verbatim (language="comment", text=
      "Feedback")
    struct Fibonacci_Feedback {
      sequence<int32> sequence;
    };
  };
};

[JEnoch]

sequence is a reserved keyword in IDL. Thus it cannot be used as an identifier.
Replacing it with another name such as just seq will work, since the struct members identifiers are not serialized in CDR (i.e. the identifiers are strictly local).

[uupks]

Replacing sequence with seq does work, but it's still can't generate source code for SendGoal_Request SendGoal_Response GetResult_Request GetResult_Response... 😟

/****************************************************************

  Generated by Eclipse Cyclone DDS IDL to C Translator
  File name: src/example_interfaces/action/Fibonacci.h
  Source: zenoh-plugin-ros2dds/examples/zenoh-pico/build/example_interfaces/action/Fibonacci.idl
  Cyclone DDS: V0.10.4

*****************************************************************/
#ifndef DDSC_SRC_EXAMPLE_INTERFACES_ACTION_FIBONACCI_H
#define DDSC_SRC_EXAMPLE_INTERFACES_ACTION_FIBONACCI_H

#include "dds/ddsc/dds_public_impl.h"

#ifdef __cplusplus
extern "C" {
#endif

typedef struct example_interfaces_action_Fibonacci_Goal
{
  int32_t order;
} example_interfaces_action_Fibonacci_Goal;

extern const dds_topic_descriptor_t example_interfaces_action_Fibonacci_Goal_desc;

#define example_interfaces_action_Fibonacci_Goal__alloc() \
((example_interfaces_action_Fibonacci_Goal*) dds_alloc (sizeof (example_interfaces_action_Fibonacci_Goal)));

#define example_interfaces_action_Fibonacci_Goal_free(d,o) \
dds_sample_free ((d), &example_interfaces_action_Fibonacci_Goal_desc, (o))

#ifndef DDS_SEQUENCE_INT32_DEFINED
#define DDS_SEQUENCE_INT32_DEFINED
typedef struct dds_sequence_int32
{
  uint32_t _maximum;
  uint32_t _length;
  int32_t *_buffer;
  bool _release;
} dds_sequence_int32;

#define dds_sequence_int32__alloc() \
((dds_sequence_int32*) dds_alloc (sizeof (dds_sequence_int32)));

#define dds_sequence_int32_allocbuf(l) \
((int32_t *) dds_alloc ((l) * sizeof (int32_t)))
#endif /* DDS_SEQUENCE_INT32_DEFINED */

typedef struct example_interfaces_action_Fibonacci_Result
{
  dds_sequence_int32 seq;
} example_interfaces_action_Fibonacci_Result;

extern const dds_topic_descriptor_t example_interfaces_action_Fibonacci_Result_desc;

#define example_interfaces_action_Fibonacci_Result__alloc() \
((example_interfaces_action_Fibonacci_Result*) dds_alloc (sizeof (example_interfaces_action_Fibonacci_Result)));

#define example_interfaces_action_Fibonacci_Result_free(d,o) \
dds_sample_free ((d), &example_interfaces_action_Fibonacci_Result_desc, (o))

#ifndef DDS_SEQUENCE_INT32_DEFINED
#define DDS_SEQUENCE_INT32_DEFINED
typedef struct dds_sequence_int32
{
  uint32_t _maximum;
  uint32_t _length;
  int32_t *_buffer;
  bool _release;
} dds_sequence_int32;

#define dds_sequence_int32__alloc() \
((dds_sequence_int32*) dds_alloc (sizeof (dds_sequence_int32)));

#define dds_sequence_int32_allocbuf(l) \
((int32_t *) dds_alloc ((l) * sizeof (int32_t)))
#endif /* DDS_SEQUENCE_INT32_DEFINED */

typedef struct example_interfaces_action_Fibonacci_Feedback
{
  dds_sequence_int32 seq;
} example_interfaces_action_Fibonacci_Feedback;

extern const dds_topic_descriptor_t example_interfaces_action_Fibonacci_Feedback_desc;

#define example_interfaces_action_Fibonacci_Feedback__alloc() \
((example_interfaces_action_Fibonacci_Feedback*) dds_alloc (sizeof (example_interfaces_action_Fibonacci_Feedback)));

#define example_interfaces_action_Fibonacci_Feedback_free(d,o) \
dds_sample_free ((d), &example_interfaces_action_Fibonacci_Feedback_desc, (o))

#ifdef __cplusplus
}
#endif

#endif /* DDSC_SRC_EXAMPLE_INTERFACES_ACTION_FIBONACCI_H */