feat(sqlserver): Part 9 — dbt init profile wizard (optional)

[axellpadilla]

Part of dbt-labs#15714 (upstream feature request). Depends on #2. Optional — doesn't block dbt build working via a hand-written profiles.yml; can slip past the initial PR.

Work items

• Add AdapterType::SqlServer to get_available_adapters() in src/profile_setup.rs
• src/adapter_config/sqlserver_config.rs implementing InteractiveSetup, modeled on fabric_config.rs
• Export from src/adapter_config/mod.rs
• Match arm in create_profile_for_adapter()

Full detail: dbt-sqlserver-v2-roadmap plan/02-implementation-steps.md §5.3.1

PRs against sqlserver-v2-port in this repo, use Closes #<this issue>.