Is your feature request related to a problem? Please describe.
We need to create a new core profile specification document in the jakartaee-platform/specification tree.

Describe the solution you'd like
There should be a coreprofile subdirectory with the specification content similar to the webprofile subdirectory.

Describe alternatives you've considered
None.

Additional context
Release plan:
https://projects.eclipse.org/projects/ee4j.jakartaee-platform/releases/core-profile-10
Discussion document on specifications to include:
https://docs.google.com/document/d/1tal7dMb6DOHBCwlecViEjPqAMTMEStoZdxTVokIVW94/edit#