feat: add tag management feature

src/store/index.ts

@@ -5,8 +5,23 @@ Vue.use(Vuex)
 
 export default new Vuex.Store({
   state: {
+    alert: {
+      color: '',
+      text: '',
+      enabled: false
+    }
   },
   mutations: {
+    ADD_ALERT (state, payload) {
+      state.alert = {
+        color: payload.color,
+        text: payload.text,
+        enabled: true
+      }
+    },
+    DISABLE_ALERT (state) {
+      state.alert.enabled = false
+    }
   },
   actions: {
   },