docs: guidelines upgrade

[Neilblaze]

Description

A few additions including a better README, Contributor guidelines, and project LICENSE (Apache 2.0)

• Resolved issues : Discussion / cc: @frank-zsy
• Closes NA

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Before submitting the PR, please take the following into consideration

• [x] It's really useful if your PR references an issue where it is discussed ahead of time. In many cases, features are absent for a reason. If you don't have an issue, please create one.
• [x] Prefix your PR title with feat:, fix:, chore:, docs:, or refactor:.
• [x] The description should clearly illustrate what problems it solves.
• [x] Ensure that the commit messages follow our guidelines.
• [x] Resolve merge conflicts (if any).
• [x] Make sure that the current branch is upto date with the main branch.

NOTE: Following this PR, DCO's will be mandated per commits introduced to this repo via PR(s).

[frank-zsy]

Apache 2.0 License looks good and the contributing doc is great, thanks.