added boris reducer

src/redux/boris/reducer.ts

@@ -0,0 +1,22 @@
+import { createReducer } from '~/utils/reducer';
+import { BORIS_HANDLERS } from './handlers';
+
+export type IStatGitRow = {
+  commit: string;
+  subject: string;
+  timestamp: string;
+};
+
+export type IBorisState = Readonly<{
+  stats: {
+    git: IStatGitRow[];
+  };
+}>;
+
+const BORIS_INITIAL_STATE: IBorisState = {
+  stats: {
+    git: [],
+  },
+};
+
+export default createReducer(BORIS_INITIAL_STATE, BORIS_HANDLERS);