home: add minerva dashboard scaffold

home/minerva-dashboard/app/config.py

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+from __future__ import annotations
+
+import os
+from dataclasses import dataclass
+from pathlib import Path
+
+
+@dataclass(slots=True)
+class Settings:
+    app_name: str = 'Minerva Dashboard'
+    default_state_dir: Path = Path(os.environ.get('MINERVA_STATE_DIR', '/tmp/minerva-dashboard-state'))