license: update text

docs: use @return instead of @returns

mesh:mesh publication uses mesh_upper_transport_request_to_send

mesh: prefix with mesh and move heartbeat helper functions to mesh_node [a2593]

mesh: prefix with mesh and move heartbeat helper functions to mesh_node [a2593]

mesh: add destination field to heartbeat messages of configuration client [a2591]

mesh: implement config client heartbeat publication and subscription msgs [a2580, a2581]

mesh: implement config client key refresh msgs [a2579]

mesh: move mesh_node_identity_state_t definition from mesh proxy to node

mesh/access: add period_divisor to implement fast period divisor in health server for active faults

mesh: add mesh_node_get_health_server, rename mesh_model_get_configuration_server to mesh_node_get_configuration_server

mesh: allow to configure node info: cid, pid, vid

mesh: rewrite model publication logic

mesh: fix warnings

mesh: health server events and handlers: period and attention get/set/set_unacknowledged

mesh: health server handlers: fault_test, fault_test_unacknowledged, period_get

mesh: move model utility functions to mesh_node from access

mesh: move mesh files to src/mesh, update includes

mesh: mesh_node_get_device_uuid returns NULL if not set

mesh: add mesh_node_set_element_location

mesh: add mesh_node_get/set_device_uuid

mesh: prefix mesh_node functions

mesh: add mesh_element_count and use in mesh_network

mesh: move node->element management to mesh_node

mesh: move mesh_node into src/mesh