docs: Add section on DSL buildStatement() and prepareSQL()

[bog-walk]

Description

Summary of the change: Add subsection to DSL root about statement builder

Detailed description:

• Why:

  • Minimal documentation about Query.prepareSQL() except in FAQ
  • New V1 buildStatement() functionality not documented yet

• What:

  • Add new file under DSL section
    • Reroute FAQ answer to this file
  • Add content about prepareSQL() with queries
  • Add content about buildStatement() introduced in V1
  • Add details on how to use non-executed statement withexec()

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Type of Change

Please mark the relevant options with an "X":

• Documentation update

[bog-walk]

@vnikolova This is sort of a draft following a TODO I'm resolving, in that I'm willing to have any of the following changed depending on your advice:

• Location (and name) of new file
• Whether file should be .md or .topic
• All samples are hard-coded at the moment. Please let me know, based on the final location of this section, which snippets could/should be used to store samples.

I just wanted to lay out the content for the final api, so feel free to push any changes you think are best.

[vnikolova]

Thanks for this addition @bog-walk!
Looks great - I only suggest a different title and using second person whenever possible.