devel/gnatcoll-core: New Port, GNAT Components Core

The GNAT Reusable Components Collection (GNATColl) - Core package.

The GNATColl reusable library is based on one main principle:
general-purpose packages that are part of the GNAT technology should
also be available to GNAT user application code. The compiler front end,
the GNAT Programming Studio (GPS) Interactive Development Environment,
and the GNAT Tracker web-based interface all served as sources for the
components.

The GNATColl components complement the predefined Ada and GNAT libraries
and deal with a range of common programming issues including string and
text processing, memory management, and file handling. Several of the
components are especially useful in enterprise applications.

https://docs.adacore.com/live/wave/gnatcoll-core/html/gnatcoll-core_ug/index.html

PR: 296496