Preview compiled Jinja templates

**Is your feature request related to a problem? Please describe.**
Currently, there's no way to see the result of applying [Jinja transformations](https://cube.dev/docs/product/data-modeling/dynamic/jinja) to YAML data models. It makes debugging complex data model files with heavy use of Jinja quite non-trivial.

**Describe the solution you'd like**
Something that would allow to preview compiled data model files, all or just select ones.

**Describe alternatives you've considered**
When there's a syntax error in the data model file, Cube will output a few lines of code; that is helpful!