Add typed serial settings operations

Route bounded admin mutations through the existing administration
dispatcher,
covering apply, lifecycle, persistence, authorization, and result
tracking.
Add the browser controls, automatic result refresh, regression coverage,
and
phase documentation.

src/CMakeLists.txt

@@ -31,6 +31,7 @@ idf_component_register(
         "user_console.c"
         "web_security.c"
         "web_serial_transport.c"
+        "web_serial_settings.c"
         "web_admin_tickets.c"
         "web_admin_transport.c"
         "web_assets_data.c"