Vuex Structure (#8054)

* wip: vuex structure

* add missing files

* client: do not fail dev build on eslint error

* eslint does not block compilation, mount app when data is ready

* eslintrc.js -> eslintrc

website/client/vuex/store.js

@@ -1,12 +1,17 @@
 import Vue from 'vue';
 import Vuex from 'vuex';
+import * as mutations from './mutations';
+import * as actions from './actions';
 
 Vue.use(Vuex);
 
 const state = {
   title: 'Habitica',
+  user: {},
 };
 
 export default new Vuex.Store({
   state,
+  mutations,
+  actions,
 });