core&ui: add problem_config

Co-authored-by: undefined <i@undefined.moe>

packages/ui-default/components/problemconfig/reducer/testdata.ts

@@ -0,0 +1,16 @@
+export default function reducer(state = [], action) {
+  switch (action.type) {
+  case 'CONFIG_LOAD_FULFILLED': {
+    return state.concat(action.payload.testdata);
+  }
+  case 'CONFIG_DELETE_TESTDATA': {
+    return state.filter((i) => i.name !== action.payload.name);
+  }
+  case 'CONFIG_ADD_TESTDATA': {
+    state.push(action.payload);
+    return state;
+  }
+  default:
+    return state;
+  }
+}