add upload button for fav words

src/views/Options/UploadButton.js

@@ -0,0 +1,55 @@
+import { useRef } from "react";
+import FileUploadIcon from "@mui/icons-material/FileUpload";
+import { useI18n } from "../../hooks/I18n";
+import Button from "@mui/material/Button";
+
+export default function UploadButton({
+  handleImport,
+  text,
+  fileType = "json",
+  fileExts = [".json"],
+}) {
+  const i18n = useI18n();
+  const inputRef = useRef(null);
+  const handleClick = () => {
+    if (inputRef.current) {
+      inputRef.current.click();
+      inputRef.current.value = null;
+    }
+  };
+  const onChange = (e) => {
+    const file = e.target.files[0];
+    if (!file) {
+      return;
+    }
+
+    if (!file.type.includes(fileType)) {
+      alert(i18n("error_wrong_file_type"));
+      return;
+    }
+
+    const reader = new FileReader();
+    reader.onload = async (e) => {
+      handleImport(e.target.result);
+    };
+    reader.readAsText(file);
+  };
+
+  return (
+    <Button
+      size="small"
+      variant="outlined"
+      onClick={handleClick}
+      startIcon={<FileUploadIcon />}
+    >
+      {text}
+      <input
+        type="file"
+        accept={fileExts.join(", ")}
+        ref={inputRef}
+        onChange={onChange}
+        hidden
+      />
+    </Button>
+  );
+}