Add docs for CREATE TABLE ... AS OF SYSTEM TIME

[rmloveland]

Fixes DOC-13310

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Files changed:

• src/current/v25.2/create-table-as.md
• src/current/v25.2/disaster-recovery-planning.md

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[rafiss]

these changes lgtm!

i wasn't sure if @dikshant also wanted to have CREATE MATERIALIZED VIEW ... AS OF SYSTEM TIME documented. i'll leave that decision to him.

[dikshant]

Yeah we also want the materialized view part to be documented. But I'll leave it to Rich to decide if he wants to do that in this PR or a new one.

[dikshant]

Overall LGTM but One more example that I think we should add!

[rmloveland]

Yeah we also want the materialized view part to be documented. But I'll leave it to Rich to decide if he wants to do that in this PR or a new one.

I'll do it in another PR! would rather get this smaller one now in so folks can start using this ASAP