Reorganize project layout. Add buildability.

pyproject.toml

@@ -0,0 +1,21 @@
+[build-system]
+requires      = ["pdm-backend"]
+build-backend = "pdm.backend"
+
+
+[project]
+name = "heckformat"
+dynamic = ["version"]
+description = "A simple format for configuration and content storage."
+authors = [{name = "Cassowary", email="cassowary@aldercone.studio"}]
+dependencies = ["ply>=3.1"]
+requires-python = ">=3.8"
+readme = "README.md"
+license = {text = "LICENSE"}
+
+[tool.pdm.build]
+package-dir = "python"
+
+[tool.pdm.version]
+source = "file"
+path = "python/heckformat/__init__.py"