feat：完成头像上传的功能

packages/@core/base/shared/src/utils/download.ts

@@ -96,6 +96,25 @@ export function downloadFileFromBlobPart({
   triggerDownload(url, fileName);
 }
 
+/**
+ * @description: base64 to blob
+ */
+export function dataURLtoBlob(base64Buf: string): Blob {
+  const arr = base64Buf.split(',');
+  const typeItem = arr[0];
+  // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+  const mime = typeItem!.match(/:(.*?);/)![1];
+  // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+  const bstr = window.atob(arr[1]!);
+  let n = bstr.length;
+  const u8arr = new Uint8Array(n);
+  while (n--) {
+    // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+    u8arr[n] = bstr.codePointAt(n)!;
+  }
+  return new Blob([u8arr], { type: mime });
+}
+
 /**
  * img url to base64
  * @param url