Add release notes stub for 2023.2

documentation/release-notes/source/2023.2.rst

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+*****************
+Open Dylan 2023.2
+*****************
+
+This document describes the 2023.2 release of Open Dylan, released 25
+December, 2023.  The highlights of the release are listed below.  For complete
+details see the `commit logs
+<https://github.com/dylan-lang/opendylan/compare/v2023.1.0...v2023.2.0>`_ for
+this release.
+
+.. note:: Some commit logs, for example for testworks and other libraries that
+          are included in Open Dylan as git submodules, may be in other
+          repositories.
+
+* Download the release: http://opendylan.org/download
+* Read documentation: http://opendylan.org/documentation
+* Report problems: https://github.com/dylan-lang/opendylan/issues
+
+
+Compiler
+========
+
+* The ``dylan-compiler-with-tools`` executable has been removed and its
+  functionality has been merged into ``dylan-compiler``.
+
+
+Tooling
+=======
+
+
+Library Updates
+===============
+
+Submodules
+----------
+
+
+system Library
+--------------
+
+
+
+Contributors
+============
+
+We'd like to thank all the people who made contributions to this release and to
+surrounding libraries in the Dylan ecosystem. This list is probably
+incomplete...
+
+* Peter S. Housel
+* Carl Gay