feat(sdk): small usability improvements for embedding cli (#49591)

* move the database prompt to the very beginning

* ability to use sample database for cli

* print username and password in console

* no tenancy isolation as a default option

* highlight sample credentials file

* update credential log messages

Co-authored-by: Mahatthana (Kelvin) Nomsawadi <me@bboykelvin.dev>

* continue without tenancy isolation

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Co-authored-by: Mahatthana (Kelvin) Nomsawadi <me@bboykelvin.dev>