Expand init prompts in template

[gwenwindflower]

resolves #728

Problem

Prompts were very terse and didn't display great in the CLI.

Solution

Made 'em more verbose.

Checklist

• I have read the contributing guide and understand what's expected of me
• I have run this code in development and it appears to resolve the stated issue
• This PR includes tests, or tests are not required/relevant for this PR
• This PR has no interface changes (e.g. macros, cli, logs, json artifacts, config files, adapter interface, etc) or this PR has already received feedback and approval from Product or DX

[github-actions]

Thank you for your pull request! We could not find a changelog entry for this change. For details on how to document a change, see the dbt-snowflake contributing guide.

[mikealfare]

I left a few comments, and then we would need a changie entry as well. I think I would call this Under the Hood?

[dbeatty10]

I left a few comments, and then we would need a changie entry as well. I think I would call this Under the Hood?

@gwenwindflower here's the instructions to create an changelog entry:

1. Follow the steps to install changie for your system.
2. changie new
   • Fill out the answers
   • It will spit out a .yml file at the end
3. Commit and push that .yml file. I typically use a simple commit message like "Changelog entry".

[mikealfare]

In order to avoid some extra work, we're going to wait until the adapter/core decoupling work is done, and then update this PR with those changes (should be virtually nothing) before merging in.

[github-actions]

This PR has been marked as Stale because it has been open with no activity as of late. If you would like the PR to remain open, please comment on the PR or else it will be closed in 7 days.