feat: implement task group actions

- allow sorting specifc task groups
- duplicate task group
- delete all tasks in task group

frontend/src/shared/graphql/taskGroup/duplicateTaskGroup.ts

@@ -0,0 +1,26 @@
+import gql from 'graphql-tag';
+import TASK_FRAGMENT from '../fragments/task';
+
+const DUPLICATE_TASK_GROUP_MUTATION = gql`
+mutation duplicateTaskGroup($taskGroupID: UUID!, $name: String!, $position: Float!, $projectID: UUID!) {
+  duplicateTaskGroup(
+  input: {
+    projectID: $projectID
+    taskGroupID: $taskGroupID
+    name: $name
+    position: $position
+  }
+  ) {
+    taskGroup {
+      id
+      name
+      position
+      tasks {
+        ...TaskFields
+      }
+    }
+  }
+
+  ${TASK_FRAGMENT}
+}
+`;