refactor(examples): group trace examples under examples/system/tracing/

Move 6 trace-related examples (app_trace_basic, app_trace_to_plot,
esp_trace, gcov, sysview_tracing, sysview_tracing_heap_log) from
examples/system/ into a dedicated examples/system/tracing/
subdirectory for better organization.

Update all path references across documentation (en + zh_CN),
build-test-rules, CI configs and component READMEs.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KZAGzon27T12sGbDPPbZ8G

tools/ci/check_copyright_ignore.txt

@@ -843,9 +843,6 @@ examples/system/esp_event/user_event_loops/main/main.c
 examples/system/esp_timer/main/esp_timer_example_main.c
 examples/system/eventfd/main/eventfd_example.c
 examples/system/freertos/real_time_stats/main/real_time_stats_example_main.c
-examples/system/gcov/components/sample/some_funcs.c
-examples/system/gcov/main/gcov_example_func.c
-examples/system/gcov/main/gcov_example_main.c
 examples/system/gdbstub/main/gdbstub_main.c
 examples/system/himem/main/himem_example_main.c
 examples/system/ota/advanced_https_ota/main/advanced_https_ota_example.c
@@ -856,8 +853,6 @@ examples/system/ota/simple_ota_example/main/simple_ota_example.c
 examples/system/perfmon/main/perfmon_example_main.c
 examples/system/select/main/select_example.c
 examples/system/startup_time/main/hello_world_main.c
-examples/system/sysview_tracing/main/sysview_tracing.c
-examples/system/sysview_tracing_heap_log/main/sysview_heap_log.c
 examples/system/task_watchdog/main/task_watchdog_example_main.c
 examples/system/unit_test/components/testable/include/testable.h
 examples/system/unit_test/components/testable/mean.c

tools/ci/executable-list.txt

@@ -42,10 +42,10 @@ examples/build_system/cmake/idf_as_lib/run.sh
 examples/common_components/protocol_examples_tapif_io/make_tap_netif
 examples/storage/parttool/parttool_example.py
 examples/storage/parttool/parttool_example.sh
-examples/system/app_trace_to_plot/read_trace.py
 examples/system/ota/otatool/get_running_partition.py
 examples/system/ota/otatool/otatool_example.py
 examples/system/ota/otatool/otatool_example.sh
+examples/system/tracing/app_trace_to_plot/read_trace.py
 install.fish
 install.sh
 tools/activate.py

tools/esp_app_trace/test/sysview/README.md

@@ -5,7 +5,7 @@
     Build example `sysview_tracing_heap_log` project.
 
     ```
-    cd $IDF_PATH/examples/system/sysview_tracing_heap_log
+    cd $IDF_PATH/examples/system/tracing/sysview_tracing_heap_log
     idf.py set target esp32
     idf.py build
     cp build/sysview_tracing_heap_log.elf $IDF_PATH/tools/esp_app_trace/test/sysview/
@@ -18,12 +18,12 @@
     Flash the example and run OpenOCD and GDB using the following command in a separate console
 
     ```
-    cd $IDF_PATH/examples/system/sysview_tracing_heap_log
+    cd $IDF_PATH/examples/system/tracing/sysview_tracing_heap_log
     idf.py openocd
     ```
 
     ```
-    cd $IDF_PATH/examples/system/sysview_tracing_heap_log
+    cd $IDF_PATH/examples/system/tracing/sysview_tracing_heap_log
     xtensa-esp32-elf-gdb -x $IDF_PATH/tools/esp_app_trace/test/sysview/gdbinit build/sysview_tracing_heap_log.elf
     ```
     When program stops at `heap_trace_stop`  quit GDB and OpenOCD
@@ -39,12 +39,12 @@
     Flash the example and run OpenOCD and GDB using the following command in a separate console
 
     ```
-    cd $IDF_PATH/examples/system/sysview_tracing_heap_log
+    cd $IDF_PATH/examples/system/tracing/sysview_tracing_heap_log
     idf.py openocd
     ```
 
     ```
-    cd $IDF_PATH/examples/system/sysview_tracing_heap_log
+    cd $IDF_PATH/examples/system/tracing/sysview_tracing_heap_log
     xtensa-esp32-elf-gdb -x $IDF_PATH/tools/esp_app_trace/test/sysview/gdbinit-mcore build/sysview_tracing_heap_log.elf
     ```
     When program stops at `heap_trace_stop`  quit GDB and OpenOCD