feat: add StemAtlas Streamlit app, explorer, Docker deployment, blog charts

pages/1_Stemwijzer.py

@@ -0,0 +1,5 @@
+"""Stemwijzer page — thin wrapper around the existing app module."""
+
+from app import main  # noqa: F401  (module-level set_page_config runs on import)
+
+main()

pages/2_Explorer.py

@@ -0,0 +1,5 @@
+"""Politiek Explorer page — thin wrapper around the explorer module."""
+
+from explorer import run_app
+
+run_app()