legal - add cla agrement to pr template

[frankiebee]

I am updating pr template to include

I have read the CLA Document and I hereby sign the CLA

I have read the CLA Document and I hereby sign the CLA

[github-actions]

Thank you for your submission, we really appreciate it. Like many open-source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution. You can sign the CLA by just posting a Pull Request Comment same as the below format.

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I have read the CLA Document and I hereby sign the CLA

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_{You can retrigger this bot by commenting recheck in this Pull Request. Posted by the CLA Assistant Lite bot.}

[frankiebee]

apparently it needs to be it's own comment... not that smart of a bot 😢 closing this PR

[vitropy]

Please do not do this, I think it defeats the purpose of the having a CLA bot in the first place.