Add get role controller. Optimize code.

src/main/kotlin/top/fatweb/api/converter/permission/GroupConverter.kt

@@ -0,0 +1,22 @@
+package top.fatweb.api.converter.permission
+
+import com.baomidou.mybatisplus.core.metadata.IPage
+import top.fatweb.api.entity.permission.Group
+import top.fatweb.api.vo.PageVo
+import top.fatweb.api.vo.permission.GroupVo
+
+object GroupConverter {
+    fun groupPageToGroupPageVo(groupPage: IPage<Group>): PageVo<GroupVo> = PageVo(
+        groupPage.total,
+        groupPage.pages,
+        groupPage.size,
+        groupPage.current,
+        groupPage.records.map {
+            GroupVo(
+                id = it.id,
+                name = it.name,
+                enable = it.enable == 1
+            )
+        }
+    )
+}