Add commands for "sticky" options

[bradlo]

Commands

• get-option
• set-option
• list-options
• delete-option
• reset-options

The precedence for options/settings is:

• command-line > options > config

Settings should include

• config-file path
• config profile
• host, port
• database
• engine

.. and we might also want a list-settings command.

[andy-dean-rai]

Could standard environment variables such as RAI_PROFILE, RAI_DATABASE, RAI_ENGINE be considered as well?

[bradlo]

yes, all add an additional item for env var support.

[torkins]

todo: should we generate sdk-specific env parsing issue?

[billscheidel-rai]

Note: This issue has been migrated to https://relationalai.atlassian.net/browse/RAI-4918.

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