[core] add separate neighbor.hpp, child.hpp, and router.hpp (#9376

)

This commit adds separate files for `Neighbor`, `Child`, and `Router`
classes.

src/core/BUILD.gn

@@ -604,6 +604,8 @@ openthread_core_files = [
   "thread/announce_sender.hpp",
   "thread/anycast_locator.cpp",
   "thread/anycast_locator.hpp",
+  "thread/child.cpp",
+  "thread/child.hpp",
   "thread/child_mask.hpp",
   "thread/child_supervision.cpp",
   "thread/child_supervision.hpp",
@@ -646,6 +648,8 @@ openthread_core_files = [
   "thread/mlr_manager.cpp",
   "thread/mlr_manager.hpp",
   "thread/mlr_types.hpp",
+  "thread/neighbor.cpp",
+  "thread/neighbor.hpp",
   "thread/neighbor_table.cpp",
   "thread/neighbor_table.hpp",
   "thread/network_data.cpp",
@@ -674,6 +678,8 @@ openthread_core_files = [
   "thread/panid_query_server.hpp",
   "thread/radio_selector.cpp",
   "thread/radio_selector.hpp",
+  "thread/router.cpp",
+  "thread/router.hpp",
   "thread/router_table.cpp",
   "thread/router_table.hpp",
   "thread/src_match_controller.cpp",
@@ -685,8 +691,6 @@ openthread_core_files = [
   "thread/time_sync_service.hpp",
   "thread/tmf.cpp",
   "thread/tmf.hpp",
-  "thread/topology.cpp",
-  "thread/topology.hpp",
   "thread/uri_paths.cpp",
   "thread/uri_paths.hpp",
   "thread/version.hpp",

src/core/CMakeLists.txt

@@ -195,6 +195,7 @@ set(COMMON_SOURCES
     thread/announce_begin_server.cpp
     thread/announce_sender.cpp
     thread/anycast_locator.cpp
+    thread/child.cpp
     thread/child_supervision.cpp
     thread/child_table.cpp
     thread/csl_tx_scheduler.cpp
@@ -215,6 +216,7 @@ set(COMMON_SOURCES
     thread/mle_tlvs.cpp
     thread/mle_types.cpp
     thread/mlr_manager.cpp
+    thread/neighbor.cpp
     thread/neighbor_table.cpp
     thread/network_data.cpp
     thread/network_data_leader.cpp
@@ -229,12 +231,12 @@ set(COMMON_SOURCES
     thread/network_diagnostic_tlvs.cpp
     thread/panid_query_server.cpp
     thread/radio_selector.cpp
+    thread/router.cpp
     thread/router_table.cpp
     thread/src_match_controller.cpp
     thread/thread_netif.cpp
     thread/time_sync_service.cpp
     thread/tmf.cpp
-    thread/topology.cpp
     thread/uri_paths.cpp
     utils/channel_manager.cpp
     utils/channel_monitor.cpp

src/core/mac/data_poll_sender.hpp

@@ -42,7 +42,7 @@
 #include "common/timer.hpp"
 #include "mac/mac.hpp"
 #include "mac/mac_frame.hpp"
-#include "thread/topology.hpp"
+#include "thread/neighbor.hpp"
 
 namespace ot {
 

src/core/mac/mac.cpp

@@ -48,11 +48,12 @@
 #include "crypto/sha256.hpp"
 #include "mac/mac_frame.hpp"
 #include "radio/radio.hpp"
+#include "thread/child.hpp"
 #include "thread/child_table.hpp"
 #include "thread/link_quality.hpp"
 #include "thread/mle_router.hpp"
+#include "thread/neighbor.hpp"
 #include "thread/thread_netif.hpp"
-#include "thread/topology.hpp"
 
 namespace ot {
 namespace Mac {

src/core/mac/mac_filter.cpp

@@ -38,7 +38,7 @@
 #include "common/array.hpp"
 #include "common/as_core_type.hpp"
 #include "common/code_utils.hpp"
-#include "thread/topology.hpp"
+#include "thread/neighbor.hpp"
 
 namespace ot {
 namespace Mac {