Turn into Python package

pyproject.toml

+[tool.poetry]
+name = "pelican-theme-teckids"
+version = "0.0"
+description = "Pelican theme for Teckids websites"
+authors = ["Dominik George <dominik.george@teckids.org>"]
+license = "CC-BY-SA"
+exclude = ["**/.git"]
+
+[tool.poetry.dependencies]
+python = ">2.0"
+
+[tool.poetry.dev-dependencies]
+
+[build-system]
+requires = ["poetry-core>=1.0.0"]
+build-backend = "poetry.core.masonry.api"