Support for filter by parent document (#6850)

* Backend support for filter by parent document

* parentDocumentId -> documentId

app/scenes/Search/components/DocumentFilter.tsx

@@ -0,0 +1,25 @@
+import { CloseIcon } from "outline-icons";
+import * as React from "react";
+import { useTranslation } from "react-i18next";
+import Document from "~/models/Document";
+import { StyledButton } from "~/components/FilterOptions";
+import Tooltip from "~/components/Tooltip";
+
+type Props = {
+  document: Document;
+  onClick: React.MouseEventHandler;
+};
+
+export function DocumentFilter(props: Props) {
+  const { t } = useTranslation();
+
+  return (
+    <div>
+      <Tooltip content={t("Remove document filter")} delay={350}>
+        <StyledButton onClick={props.onClick} icon={<CloseIcon />} neutral>
+          {props.document.title}
+        </StyledButton>
+      </Tooltip>
+    </div>
+  );
+}