docs: modify copyright headers for files taken and modified from

third-party sources

examples/common/blemesh_platform/platform/ESP32_custom/BUILD.gn

@@ -1,3 +1,14 @@
+# SPDX-FileCopyrightText: 2021 Project CHIP Authors
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# SPDX-FileContributor: 2024 Espressif Systems (Shanghai) PTE LTD
+#
+# Modified the original code to support blemesh platform on ESP32 SoCs.
+#
+# For original code and license information, please refer to
+# https://github.com/project-chip/connectedhomeip
+
 # Copyright (c) 2021 Project CHIP Authors
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

examples/common/blemesh_platform/platform/ESP32_custom/nimble/BLEManagerImpl.cpp

@@ -1,3 +1,14 @@
+// SPDX-FileCopyrightText: 2020-2021 Project CHIP Authors
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+// SPDX-FileContributor: 2024 Espressif Systems (Shanghai) PTE LTD
+//
+// Modified the original code to support blemesh platform on ESP32 SoCs.
+//
+// For original code and license information, please refer to
+// https://github.com/project-chip/connectedhomeip
+
 /*
  *
  *    Copyright (c) 2020-2021 Project CHIP Authors

examples/common/external_platform/BUILD.gn

@@ -1,3 +1,14 @@
+# SPDX-FileCopyrightText: 2020-2021 Project CHIP Authors
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# SPDX-FileContributor: 2022-2024 Espressif Systems (Shanghai) PTE LTD
+#
+# Modified the original code to support external platform on ESP32 SoCs.
+#
+# For original code and license information, please refer to
+# https://github.com/project-chip/connectedhomeip
+
 # Copyright (c) 2021 Project CHIP Authors
 #
 # Licensed under the Apache License, Version 2.0 (the "License");