revert to sqrbot-style __init__.py that doesn't break the build

Author: ameisner

python/rubin/rag/__init__.py

@@ -1,22 +1,16 @@
-# This file is part of rubin_rag.
-#
-# Developed for the LSST Data Management System.
-# This product includes software developed by the LSST Project
-# (https://www.lsst.org).
-# See the COPYRIGHT file at the top-level directory of this distribution
-# for details of code ownership.
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+"""Rubin RAG-basd LLM Application."""
 
-# from .version import *
+__all__ = ["__version__"]
+
+from importlib.metadata import PackageNotFoundError, version
+
+__version__: str
+"""The version string of rubin.rag
+(PEP 440 / SemVer compatible).
+"""
+
+try:
+    __version__ = version(__name__)
+except PackageNotFoundError:
+    # package is not installed
+    __version__ = "0.0.1"