feat: export SQL engine registration from package

Expose HotdataMarimoEngine and register_hotdata_sql_engine from the
top-level package and extend import tests.

Author: eddietejeda

hotdata_marimo/__init__.py

@@ -16,13 +16,19 @@
     recent_results,
     run_history,
 )
+from hotdata_marimo.sql_engine import (
+    HotdataMarimoEngine,
+    register_hotdata_sql_engine,
+    unregister_hotdata_sql_engine,
+)
 from hotdata_marimo.sql_editor import SqlEditor, sql_editor
 from hotdata_marimo.table_browser import TableBrowser, connection_picker, table_browser
 from hotdata_marimo.workspace_selector import WorkspaceSelector, workspace_selector_from_env
 
 __all__ = [
     "__version__",
     "HotdataClient",
+    "HotdataMarimoEngine",
     "QueryResult",
     "RecentResults",
     "SqlEditor",
@@ -39,11 +45,13 @@
     "hotdata_workspace_selector",
     "query_result",
     "recent_results",
+    "register_hotdata_sql_engine",
+    "register_mo_ui_hotdata_aliases",
     "run_history",
     "sql_editor",
     "table_browser",
+    "unregister_hotdata_sql_engine",
     "workspace_selector_from_env",
-    "register_mo_ui_hotdata_aliases",
 ]
 
 hotdata_sql_editor = sql_editor

tests/test_imports.py

@@ -3,3 +3,5 @@ def test_package_imports():
 
     assert hm.HotdataClient is not None
     assert hm.SqlEditor is not None
+    assert hm.register_hotdata_sql_engine is not None
+    assert hm.HotdataMarimoEngine is not None