[Feature Request] Comply to reuse spec

[rzr]

Is your feature request related to a problem? Please describe.

Complying to RUSE spec, can help to create SBOM and other compliance programs

Please confirm that project should be declared as:

SPDX-FileCopyrightText = "2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved."
SPDX-License-Identifier = "MIT AND Apache-2.0"

Describe the solution you'd like

Implement https://reuse.software/ in pipelines, I can share hints if needed

Additional context

Also it would make sense to add all licenses in project

For instance this file brings more licenses (previously GPL-2.0):

• FreeRTOS-Kernel/portable/ThirdParty/GCC/Xtensa_ESP32/include/portmacro.h MIT
• FreeRTOS-Kernel/portable/ThirdParty/GCC/Xtensa_ESP32/port.c MIT
• FreeRTOS-Kernel/portable/ThirdParty/GCC/Xtensa_ESP32/portmux_impl.h Apache-2.0
• FreeRTOS-Kernel/portable/ThirdParty/GCC/Xtensa_ESP32/portmux_impl.inc.h Apache-2.0