Update pyproject.toml to add a project script.

Author: tribeiro

pyproject.toml

@@ -18,6 +18,9 @@ version = { attr = "setuptools_scm.get_version" }
 
 [tool.setuptools.packages.find]
 where = [ "python" ]
+
+[project.scripts]
+make_pointing_model_grid = "lsst.ts.fbs.utils.maintel.pointing_model.__main__:main"
 
 [tool.setuptools_scm]
 write_to = "python/lsst/ts/fbs/utils/version.py"