ESP: Add case command to establish CASESession to another node for TC-SC-4.9(RIO Support) verification. (project-chip#13900)

* Add case command to establish CASESession to another node for ESP all-clusters-app

* Restyled by clang-format

* Use a single file ShellCommands.cpp to register the external shell commands

* Auto Format

* Add check for executing the case command before the last command done

* Restyled by clang-format

Co-authored-by: Restyled.io <commits@restyled.io>

Author: wqx6

examples/all-clusters-app/esp32/main/OnOffCommands.cpp

@@ -0,0 +1,52 @@
+/*
+ *
+ *    Copyright (c) 2022 Project CHIP Authors
+ *
+ *    Licensed under the Apache License, Version 2.0 (the "License");
+ *    you may not use this file except in compliance with the License.
+ *    You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *    Unless required by applicable law or agreed to in writing, software
+ *    distributed under the License is distributed on an "AS IS" BASIS,
+ *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *    See the License for the specific language governing permissions and
+ *    limitations under the License.
+ */
+
+#include <ShellCommands.h>
+
+namespace chip {
+namespace Shell {
+
+Shell::Engine OnOffCommands::sSubShell;
+void OnOffCommands::Register()
+{
+    static const shell_command_t subCommands[] = { { &OnLightHandler, "on", "Usage: OnOff on endpoint-id" },
+                                                   { &OffLightHandler, "off", "Usage: OnOff off endpoint-id" },
+                                                   { &ToggleLightHandler, "toggle", "Usage: OnOff toggle endpoint-id" } };
+    sSubShell.RegisterCommands(subCommands, ArraySize(subCommands));
+
+    // Register the root `OnOff` command in the top-level shell.
+    static const shell_command_t onOffCommand = { &OnOffHandler, "OnOff", "OnOff commands" };
+
+    Engine::Root().RegisterCommands(&onOffCommand, 1);
+}
+
+Callback::Callback<OnDeviceConnected> CASECommands::sOnConnectedCallback(CASECommands::OnConnected, nullptr);
+Callback::Callback<OnDeviceConnectionFailure> CASECommands::sOnConnectionFailureCallback(CASECommands::OnConnectionFailure,
+                                                                                         nullptr);
+Shell::Engine CASECommands::sSubShell;
+void CASECommands::Register()
+{
+    static const shell_command_t subCommands[] = {
+        { &ConnectToNodeHandler, "connect", "Establish CASESession to a node, Usage: case connect <fabric-index> <node-id>" },
+    };
+    sSubShell.RegisterCommands(subCommands, ArraySize(subCommands));
+
+    static const shell_command_t CASECommand = { &CASEHandler, "case", "Case Commands" };
+    Engine::Root().RegisterCommands(&CASECommand, 1);
+}
+} // namespace Shell
+} // namespace chip