Support older setuptools; expose lmfdb_search as a console script

Sage ships its own setuptools (73.0.1 in sage 10.7), which can end up
performing the build (e.g. with --no-build-isolation), so use license
metadata that setuptools >= 64 understands rather than a PEP 639 SPDX
string, which requires setuptools >= 77.

Also register the new command-line search tool as a console script, so
that pip installs get lmfdb_search on the PATH alongside lmfdb.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: roed314

pyproject.toml

@@ -1,14 +1,17 @@
+# setuptools>=64 rather than something newer: sage ships its own setuptools,
+# which can end up being used for the build (e.g. with --no-build-isolation),
+# so we stick to metadata that older versions understand (in particular the
+# license table rather than a PEP 639 SPDX string)
 [build-system]
-requires = ["setuptools>=77"]
+requires = ["setuptools>=64"]
 build-backend = "setuptools.build_meta"
 
 [project]
 name = "lmfdb"
 dynamic = ["version"]
 description = "The L-functions and modular forms database (LMFDB): python library and website"
 readme = "README.md"
-license = "GPL-2.0-or-later"
-license-files = ["LICENSE"]
+license = {text = "GPL-2.0-or-later"}
 requires-python = ">=3.9"
 authors = [
     {name = "The LMFDB Collaboration"},
@@ -18,6 +21,7 @@ classifiers = [
     "Development Status :: 5 - Production/Stable",
     "Framework :: Flask",
     "Intended Audience :: Science/Research",
+    "License :: OSI Approved :: GNU General Public License v2 or later (GPLv2+)",
     "Programming Language :: Python :: 3",
     "Topic :: Scientific/Engineering :: Mathematics",
 ]
@@ -60,6 +64,7 @@ Issues = "https://github.com/LMFDB/lmfdb/issues"
 
 [project.scripts]
 lmfdb = "lmfdb.website:main"
+lmfdb_search = "lmfdb.cmdline_search:main"
 
 [tool.setuptools]
 include-package-data = true