Add support for connection string for warehouse.
This PR gives the ability to enable warehouse on a project and also get
the connection string to connect to.
> This project is only available in staging for now and gated behind a
feature flag
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## Summary by CodeRabbit
- **New Features**
- Added a Warehouse connection option to the Connect dialog.
- Select schemas and tables to replicate, with setup progress, error
recovery, and retry support.
- View copyable Warehouse connection details, credentials guidance,
command-line instructions, and DuckLake setup scripts.
- Warehouse availability is controlled by feature configuration.
- **Tests**
- Added coverage for Warehouse table selection, setup script generation,
URL parsing, and connection configuration utilities.
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Signed-off-by: Benjamin <5719034+bnjjj@users.noreply.github.com>
Co-authored-by: Charis Lam <26616127+charislam@users.noreply.github.com>
Coenen Benjamin