console: re-use the available REPL console API and improve linenoise

Console example doesn't duplicate code in `console` component.
Linenoise has been improved: it now has a parametrized command line
length. It is now possible to paste data efficiently to the console.
Note: this can only be done if the cursor is at the end of the line.

Closes https://github.com/espressif/esp-idf/issues/7057

examples/system/console/advanced/components/cmd_system/cmd_system.h

@@ -0,0 +1,26 @@
+/* Console example — various system commands
+
+   This example code is in the Public Domain (or CC0 licensed, at your option.)
+
+   Unless required by applicable law or agreed to in writing, this
+   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+   CONDITIONS OF ANY KIND, either express or implied.
+*/
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Register all system functions
+void register_system(void);
+
+// Register common system functions: "version", "restart", "free", "heap", "tasks"
+void register_system_common(void);
+
+// Register deep and light sleep functions
+void register_system_sleep(void);
+
+#ifdef __cplusplus
+}
+#endif