fix: tidy code and update endpoints

packages/lib/server-only/share/get-share-link-by-slug.ts

@@ -0,0 +1,13 @@
+import { prisma } from '@documenso/prisma';
+
+export type GetShareLinkBySlugOptions = {
+  slug: string;
+};
+
+export const getShareLinkBySlug = async ({ slug }: GetShareLinkBySlugOptions) => {
+  return await prisma.documentShareLink.findFirstOrThrow({
+    where: {
+      slug,
+    },
+  });
+};