Reorganize the tracing documentation so esp_trace is the master
component, with app_trace, SystemView, and Gcov referenced from it.
(cherry picked from commit 6c6490d54c)
release/v6.0 still has additional check_readme_links 404s after the
master backport. Update the remaining board and ESP32-P4 API
references so the release branch no longer fails on those URLs.
Made-with: Cursor
simple_sniffer was moved from /wifi folder to /network folder
network_tests was moved from /system to /network folder
README's were updated accordingly to reflect new structure