refactor: ♻️ rename to MIT license (#80)

# Description

Since data packages will contain code as well as data, we should use a
license for the code (MIT) and for the data (to be determined later).

This PR needs a quick review.

Author: lwjohnst86

template/LICENSE.md.jinja renamed to template/LICENSE-MIT.md.jinja

@@ -1,6 +1,8 @@
 # MIT License
 
-Copyright (c) 2023-2025 Aarhus University
+<!-- TODO: Add the year -->
+
+Copyright (c) YEAR {{ package_abbrev }} authors
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

template/pyproject.toml.jinja

@@ -12,9 +12,9 @@ maintainers = [
   # TODO: Add more maintainers as needed.
 ]
 readme = "README.md"
-# TODO: Add a license for the package.
-license = ""
-license-files = ["LICENSE.md"]
+# TODO: Update with a license for the data.
+license = "MIT AND "
+license-files = ["LICENSE-MIT.md", ""]
 requires-python = ">=3.12"
 dependencies = [
     "polars>=1.27.0",