Add --dry-run option to list referenced views

[stevehansen]

Summary

Add a --dry-run (-dr) CLI option that lists all recursively referenced views and exits without performing any inlining. Useful for understanding the view dependency tree before committing to an inline operation.

Expected behavior

sqlinliner -cs "Server=.;Database=Test;Integrated Security=true" -vn "dbo.VHeavy" --dry-run

Should output the fully qualified names of all referenced views (recursively), then exit.

Implementation notes

From the previous attempt (PR #74, branch codex/add-dry-run-option-for-referenced-views):

• Add a static DatabaseView.GetReferencedViews(DatabaseConnection, string viewSql) method that recursively resolves all nested views into a Dictionary<string, DatabaseView>
• Add --dry-run / -dr option to Program.cs (using the new System.CommandLine 2.0.3 API)
• When --dry-run is set, call GetReferencedViews, print each view name, and return early

The previous branch is stale and won't merge due to the System.CommandLine 2.0.3 migration and test suite changes on main.

Supersedes PR #74.