DOCS: add helpful partitioning links

This patch adds a link to the "attach partition" command section
(similar to the detach partition link above it) as well as a link to
"create table like" as both commands contain additional information
that users should review beyond what is laid out in this section.
There's also a couple of wordsmiths in nearby areas to improve
readability.

Robert Treat
https://xzilla.net