feat: add KeywordExtractForm and BaiduForm and DuckDuckGoForm #918 (#1477)

### What problem does this PR solve?
feat: add KeywordExtractForm and BaiduForm and DuckDuckGoForm #918


### Type of change


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

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

@@ -52,11 +52,11 @@ export function RagNode({
         >
           <OperatorIcon
             name={data.label as Operator}
-            fontSize={style['iconFontSize'] ?? 24}
+            fontSize={style?.iconFontSize ?? 24}
           ></OperatorIcon>
           <span
             className={styles.type}
-            style={{ fontSize: style.fontSize ?? 14 }}
+            style={{ fontSize: style?.fontSize ?? 14 }}
           >
             {t(lowerFirst(data.label))}
           </span>