Add reference commands

[polandll]

Reference CQL commands that will be referenced in the CEP-30 Vector Search PR. I did not create a ticket for this work.

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The Cassandra Jira

[michaelsembwever]

intended to remove java17.adoc link ?

[polandll]

I did not intend to delete java17.adoc link.

[michaelsembwever]

lots of commented out xref lines in this file, is that intended ?

[polandll]

Yes, they will be added over time.