feat: add delete menu to graph node #918 (#1133)

### What problem does this PR solve?
feat: add delete menu to graph node #918

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

web/src/pages/flow/canvas/node/index.less

@@ -1,5 +1,6 @@
-.textUpdaterNode {
+.ragNode {
   // height: 50px;
+  position: relative;
   box-shadow:
     -6px 0 12px 0 rgba(179, 177, 177, 0.08),
     -3px 0 6px -4px rgba(0, 0, 0, 0.12),
@@ -13,6 +14,9 @@
     color: #777;
     font-size: 12px;
   }
+  .description {
+    font-size: 10px;
+  }
 }
 .selectedNode {
   border: 1px solid rgb(59, 118, 244);