add packaging for the different subprojects

packaging/nominatim-core/README.md

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+Nominatim - Core Package
+=========
+
+Nominatim is a tool to search OpenStreetMap data
+by name and address (geocoding) and to generate synthetic addresses of
+OSM points (reverse geocoding).
+
+This is the core pacakage containing resources and code shared by
+Nominatim's frontend `nominatim_api` and backend `nominatim_db`. You
+usually don't want to install this package directly.
+
+Documentation
+=============
+
+The documentation of the latest development version is in the
+`docs/` subdirectory. A HTML version can be found at
+https://nominatim.org/release-docs/develop/ .
+
+License
+=======
+
+The source code is available under a GPLv2 license.

packaging/nominatim-core/pyproject.toml

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+[project]
+name = "nominatim-core"
+description = "A tool for building a database of OpenStreetMap for geocoding and for searching the database. Base package for common resources for the project."
+readme = "README.md"
+requires-python = ">=3.7"
+license = 'GPL-3.0-or-later'
+maintainers = [
+  { name = "Sarah Hoffmann", email = "lonvia@denofr.de" }
+]
+keywords = [ "geocoding", "OpenStreetMap", "search" ]
+classifiers = [
+    "Programming Language :: Python :: 3",
+    "License :: OSI Approved :: GNU General Public License (GPL)",
+    "Operating System :: OS Independent",
+]
+dependencies = [
+    "python-dotenv",
+    "jinja2",
+    "pyYAML>=5.1",
+    "datrie"
+]
+dynamic = ["version"]
+
+[project.urls]
+Homepage = "https://nominatim.org"
+Issues = "https://github.com/osm-search/Nominatim/issues"
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[tool.hatch.version]
+source = "code"
+path = "../../src/nominatim_core/version.py"
+expression = "NOMINATIM_CORE_VERSION"
+
+[tool.hatch.build.targets.sdist.force-include]
+"../../src/nominatim_core" = "nominatim_core"
+"../../lib-sql" = "nominatim_core/resources/lib-sql"
+"../../settings" = "nominatim_core/resources/settings"
+"../../data/country_osm_grid.sql.gz" = "nominatim_core/resources/country_osm_grid.sql.gz"
+"../../data/words.sql" = "nominatim_core/resources/words.sql"
+"src/nominatim_core/paths.py" = "nominatim_core/paths.py"
+
+[tool.hatch.build.targets.sdist.sources]
+"src/nominatim_core" = "nominatim_core"
+
+[tool.hatch.build.targets.wheel]
+packages = ["nominatim_core"]

packaging/nominatim-core/src/nominatim_core/paths.py

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+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# This file is part of Nominatim. (https://nominatim.org)
+#
+# Copyright (C) 2024 by the Nominatim developer community.
+# For a full list of authors see the git log.
+"""
+Path settings for extra data used by Nominatim.
+"""
+from pathlib import Path
+
+PHPLIB_DIR = None
+DATA_DIR = (Path(__file__) / '..' / 'resources').resolve()
+SQLLIB_DIR = (DATA_DIR / 'lib-sql')
+CONFIG_DIR = (DATA_DIR / 'settings')