package project and add entrypoint

pyproject.toml

@@ -16,6 +16,9 @@ dependencies = [
     "ynab>=1.9.0",
 ]
 
+[project.scripts]
+catnab = "main:main"
+
 [dependency-groups]
 dev = [
     "ipdb>=0.13.13",
@@ -24,3 +27,6 @@ dev = [
 
 [tool.pytest.ini_options]
 pythonpath = ["src"]
+
+[tool.uv]
+package = true