[Feature Request]: jupiter notebook SQL CTE style support

### Feature Description

When writing a Jupiter Notebook with SQL, it would be amazing to have a CTE style support. Usually I structure my query with
1. loading required tables, columns - 1st cell
2. transform tables - 2nd cell
3. apply business logic - 3rd cell

that is more or less the overall structure. Between each step it should be possible to insert markdown descriptions.

### Problem and Motivation

With the current version one cell needs to be a complete query, so I get an error when just defining the load table CTE cell, as it is just one part of the query.

### Related Area

- [ ] Connection dialog (SQL Server | Azure browse/Fabric browse)
- [ ] Query editor
- [ ] Query results panel
- [ ] Object Explorer
- [ ] GitHub Copilot integration
- [ ] Preview/Edit data
- [ ] Table Designer
- [ ] Schema Designer
- [ ] Schema Compare
- [ ] Local SQL Server Container provisioning
- [ ] SQL database in Fabric provisioning
- [ ] DACPAC/BACPAC export/import
- [ ] SQL Database projects
- [ ] Query Plan Visualizer
- [x] Other (please describe below)

### If you selected "Other", please describe the area

SQL Notebooks

### Confirmation

- [x] I have searched existing feature requests and couldn't find a match
- [ ] I want to help implement this feature