Add Typed SSH Service Controls

Provide admin-only SSH status plus generation-safe start, stop, and
single-session disconnect operations through the bounded dispatcher.
Include
Settings UI coverage, lifecycle safeguards, and host-side regression
tests.

src/web_ssh_settings.h

@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-3.0-only */
+#pragma once
+#include <stdint.h>
+#include "esp_http_server.h"
+
+/* Optional admin-only SSH status and login-isolated ordinary controls. */
+esp_err_t web_ssh_settings_handler(httpd_req_t *request);
+esp_err_t web_ssh_operation_handler(httpd_req_t *request);
+void web_ssh_settings_execute(uint32_t id);