调整 api 目录，代码优化

src/api/system/role.js

@@ -0,0 +1,56 @@
+import request from '@/utils/request'
+
+// 获取所有的Role
+export function getAll() {
+  return request({
+    url: 'api/roles/all',
+    method: 'get'
+  })
+}
+
+export function add(data) {
+  return request({
+    url: 'api/roles',
+    method: 'post',
+    data
+  })
+}
+
+export function get(id) {
+  return request({
+    url: 'api/roles/' + id,
+    method: 'get'
+  })
+}
+
+export function getLevel() {
+  return request({
+    url: 'api/roles/level',
+    method: 'get'
+  })
+}
+
+export function del(id) {
+  return request({
+    url: 'api/roles/' + id,
+    method: 'delete'
+  })
+}
+
+export function edit(data) {
+  return request({
+    url: 'api/roles',
+    method: 'put',
+    data
+  })
+}
+
+export function editMenu(data) {
+  return request({
+    url: 'api/roles/menu',
+    method: 'put',
+    data
+  })
+}
+
+export default { add, edit, del, get, editMenu }