Add postgresql persistence of data in data dict

Moved back to sqlmodel because we do need some way
of putting this info into a database.

src/nrsk/documents/seed_doc_db.py

@@ -0,0 +1,23 @@
+"""Seed DB for documents, e.g. with doc types"""
+
+from sqlmodel import Session
+
+from nrsk import DOCS_ROOT
+from nrsk.db import get_engine
+from nrsk.documents.validate import validate_doc_types
+
+
+def seed_doc_types():
+    engine = get_engine()
+    doc_types = validate_doc_types(DOCS_ROOT / "_data" / "doc-types.yaml")
+
+    with Session(engine) as session:
+        for dtype in doc_types:
+            session.add(dtype)
+
+        session.commit()
+
+
+if __name__ == "__main__":
+    seed_doc_types()
+    print("seeded doc types")