Add typedef for FormDataEntryValue

Author: NColey

baselines/dom.generated.d.ts

@@ -14945,4 +14945,5 @@ type ScrollLogicalPosition = "start" | "center" | "end" | "nearest";
 type IDBValidKey = number | string | Date | IDBArrayKey;
 type BufferSource = ArrayBuffer | ArrayBufferView;
 type MouseWheelEvent = WheelEvent;
-type ScrollRestoration = "auto" | "manual";
+type ScrollRestoration = "auto" | "manual";
+type FormDataEntryValue = string | File;

baselines/webworker.generated.d.ts

@@ -1745,4 +1745,5 @@ type IDBKeyPath = string;
 type RequestInfo = Request | string;
 type USVString = string;
 type IDBValidKey = number | string | Date | IDBArrayKey;
-type BufferSource = ArrayBuffer | ArrayBufferView;
+type BufferSource = ArrayBuffer | ArrayBufferView;
+type FormDataEntryValue = string | File;

inputfiles/addedTypes.json

@@ -1535,6 +1535,11 @@
         "flavor": "DOM",
         "signatures": ["getElementById(elementId: string): HTMLElement | null"]
     },
+    {
+        "kind": "typedef",
+        "name": "FormDataEntryValue",
+        "type": "string | File"
+    },
     {
         "kind": "method",
         "interface": "FormData",