Add Monorepo Support

[Kenneth-Sills]

Problem

Currently, Pricore requires each repository to contain exactly one package with its composer.json at the top-level directory. It'd be nice to be able to specify an optional subdirectory or subdirectories where package(s) in the repository may be found instead.

Proposed Solution

I would imagine this would work at the "Add Repository" level. In the modal, it could have another optional field similar to the default branch input where the user can put a pattern or glob for the directories to discover composer.json packages. An organization-wide default would also be nice.

I believe this would only work when distribution mirroring is enabled, since Composer itself is otherwise unable to handle subdirectories.

Alternatives Considered

No response

Additional Context

No response

[maartenbode]

Thanks @Kenneth-Sills, good proposal. I plan on implementing this.
Let's use this issue for further input.