Feature/graph manager (#38)

* Initial changes

* Working state

* Working state

* Working state

* Working state

* Working state

* Working state

* Added graph listener

* Updates

* Testing name demangling

* Graph manager: reworked

* Remove debug trace

* Treat errors when freeing rcutils resources

* Improve logics for discovering entities

* Working state: Micro-ROS graph manager

* Fix micro_ros_graph_info typesupport type name

* Remove double CMakeLists comment

* Remove package.xml commented block

* Add missing include

* Added CI

* Remove GUID_t param from callbacks signature

* Add services names and types to micro-ROS graph topic

* Differenciate between service server and clients

* remove debug traces

Co-authored-by: Pablo Garrido <pablogs9@gmail.com>

micro_ros_agent/package.xml

@@ -8,14 +8,23 @@
   <license>Apache License 2.0</license>
 
   <buildtool_depend>ament_cmake</buildtool_depend>
-  <buildtool_export_depend>ament_cmake</buildtool_export_depend>
 
-  <depend>microxrcedds_agent</depend>
-  <depend>rosidl_cmake</depend>
-  
+  <test_depend>rosidl_default_generators</test_depend>
+
   <test_depend>ament_lint_auto</test_depend>
   <test_depend>ament_lint_common</test_depend>
 
+  <depend>microxrcedds_agent</depend>
+  <depend>rmw</depend>
+  <depend>rcutils</depend>
+  <depend>rmw_fastrtps_shared_cpp</depend>
+  <depend>rmw_dds_common</depend>
+  <depend>micro_ros_msgs</depend>
+
+  <test_depend>rosidl_typesupport_fastrtps_cpp</test_depend>
+  <test_depend>ament_cmake_gtest</test_depend>
+  <test_depend>builtin_interfaces</test_depend>
+
   <export>
     <build_type>ament_cmake</build_type>
   </export>