Convert this repo to SmartNoise docs only about docs.smartnoise.org HOT 2 CLOSED

@raprasad please check out https://docs.smartnoise.org which should now look something like this:

The only remaining item from above is this one:

• Add a link from docs.opendp.org to docs.smartnoise.org

Of course, if there's more we should do for this initial reorg before closing this issue, that's fine.

Also, we briefly discussed moving issues to other repos but after reviewing them quickly, I think we should discuss this more. I didn't create most of them and I don't know how many are still relevant.

from docs.smartnoise.org.

Add a link from docs.opendp.org to docs.smartnoise.org

Ok, I created an issue to track this remaining item: opendp/opendp#240

Closing.

from docs.smartnoise.org.