dalfox: add page (#11549)

pages/common/dalfox.md

@@ -0,0 +1,16 @@
+# dalfox
+
+> A powerful open-source XSS scanner focused on automation.
+> More information: <https://dalfox.hahwul.com/docs/usage>.
+
+- Scan a single URL for XSS vulnerabilities:
+
+`dalfox url {{http://example.com}}`
+
+- Scan a URL using a header for authentication:
+
+`dalfox url {{http://example.com}} -H {{'X-My-Header: 123'}}`
+
+- Scan a list of URLs from a file:
+
+`dalfox file {{path/to/file}}`