enable basic type checking in vscode.

slow on startup with MDS being large. it might be indexing package files from other language

.vscode/settings.json

@@ -22,6 +22,7 @@
   "python.testing.pytestArgs": ["tests"],
   "python.testing.unittestEnabled": false,
   "python.testing.pytestEnabled": true,
+  "python.analysis.typeCheckingMode": "basic",
   "yapf.args": [
     "--style={column_limit:100, spaces_before_comment:'15,30,50', SPLIT_BEFORE_EXPRESSION_AFTER_OPENING_PAREN:TRUE}"
   ]