feat: Add device-s7 documentation

[jiekechoo]

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[lenny-goodell]

Moved PR to draft util Device S7 is approved by TSC and released.

[lenny-goodell]

@jiekechoo , "docs" is not a commit message type for this repo since all commits are docs. In this case the commit message should be feat: Add device-s7 documentation.

Also, all commit messages must be Conventional Commit syntax. Your 2nd commit is not.

Please update the PR tile and commit messages to be feat: Add device-s7 documentation. You will need to squash the commits to one commit to accomplish this.

[jiekechoo]

@lenny-intel Please review,thanks.