update How we structure guide to account for dbt Mesh

[bethanyhipple-dbtlabs]

Contributions

• I have read the contribution docs, and understand what's expected of me.

Link to the page on docs.getdbt.com requiring updates

https://docs.getdbt.com/best-practices/how-we-structure/6-the-rest-of-the-project#project-splitting

What part(s) of the page would you like to see updated?

The project splitting part of the "how we structure our project" guide advises users to not split projects unless absolutely necessary. The rational here gives the example of needing to use private packages to make the project dependencies work. However with dbt Mesh now available, we should update our stance on project splitting.

Additional information

No response