feat: allowing multiple source sets (logical apps) under the same simplified structure application

[rafaelnferreira]

ATENTION! YOU SHOULD NOW BRANCH FROM PREPROD WHEN YOU UPDATE

• Please check the internal contributions guide for details

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This week's exciting advice from the style guide

• Write your headings in sentence case:

  • A good example This is a correct heading.
  • A Bad Example This is not a correct heading.

[jay-taylerson]

FYI we'll need to port this to new-docs-structure if it is part of 8.6 release .

[rafaelnferreira]

merged directly at: https://github.com/genesiscommunitysuccess/docs/blob/new-doc-structure/docs/06_operations/13_project-structure/02_simplified-structure.mdx