WIP: add sqlite search backend boilerplate

archivebox/search/backends/sqlite.py

@@ -0,0 +1,15 @@
+from typing import List, Generator
+
+from archivebox.util import enforce_types
+
+@enforce_types
+def index(snapshot_id: str, texts: List[str]):
+    pass
+
+@enforce_types
+def search(text: str) -> List[str]:
+    pass
+
+@enforce_types
+def flush(snapshot_ids: Generator[str, None, None]):
+    pass