CDP Patch 4.0.1

[amirna2]

What's Changed

This is a patch release (no updates to CDP library source code)

• ReadMe updates (fixed document, repos links)
• Doxygen updates
• PR Template updates (checklist, typo, license/copyright)
• Arduino CI updates
• Script to add SPDX headers to CDP source code.
• Updated PlatformIO INI file to be more modular
• Added a simple CDP CLI tool for building, testing and deploying CDP and examples

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This discussion was created from the release CDP Patch 4.0.1.