Make this into a functional app

Using flat layout, which is probably more common in this org.

Author: figi44

app/__init__.py

@@ -0,0 +1,6 @@
+def main() -> None:
+    print("Hello, World!")
+
+
+if __name__ == "__main__":
+    main()

app/main.py

@@ -88,6 +88,11 @@ homepage = "https://github.com/EO-DataHub/"
 repository = "CHANGEME-https://github.com/EO-DataHub/<CHANGEME>"
 changelog = "CHANGEME-https://github.com/EO-DataHub/<CHANGEME>/main/CHANGELOG.md"
 
+
+[tool.uv]
+# see https://docs.astral.sh/uv/concepts/projects/config/#project-packaging to see if you need to set this to true
+package = false
+
 [build-system]
 requires = ["hatchling"]
 build-backend = "hatchling.build"

pyproject.toml

@@ -1,2 +1,2 @@
-def test__success():
+def test__success() -> None:
     assert True