Update repository with LFAI onboarding requirements

[akchinSTC]

What changes were proposed in this pull request?

See parent PR in the elyra/community repo : elyra-ai/community#14

• Moved meeting information to community repo
• Add and update security policy
• Add and update third party file - may need to list node pkgs
• Add committers file
• Add new cc license for documentation

How was this pull request tested?

Developer's Certificate of Origin 1.1

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   (b) The contribution is based upon previous work that, to the best
       of my knowledge, is covered under an appropriate open source
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[elyra-bot]

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[kevin-bates]

I know this is a draft, so I'll hold off on detailed comments.

Did you have a source from which this was derived? Looking briefly, I came across these links (I'm sure there are others as well) that might be useful:

• https://lfdl.lfprojects.linuxfoundation.org/project-stages-and-lifecycle/
• https://github.com/lfai/tsc-template

[kevin-bates]

LGTM - thanks @akchinSTC.