fix: add electronic-signature keyword for discoverability

Author: caiopizzol

package.json

@@ -41,6 +41,7 @@
     "superdoc",
     "esign",
     "esignature",
+    "electronic-signature",
     "clickwrap",
     "agreement",
     "document",
@@ -100,4 +101,4 @@
   "engines": {
     "node": ">=18"
   }
-}
+}