feat: add "creatorEmail" config bariable to share recipient email message

backend/prisma/seed/config.seed.ts

@@ -84,7 +84,7 @@ const configVariables: ConfigVariables = {
     shareRecipientsMessage: {
       type: "text",
       defaultValue:
-        "Hey!\n\n{creator} shared some files with you, view or download the files with this link: {shareUrl}\n\nThe share will expire {expires}.\n\nNote: {desc}\n\nShared securely with Pingvin Share 🐧",
+        "Hey!\n\n{creator} ({creatorEmail}) shared some files with you, view or download the files with this link: {shareUrl}\n\nThe share will expire {expires}.\n\nNote: {desc}\n\nShared securely with Pingvin Share 🐧",
     },
     reverseShareSubject: {
       type: "string",

backend/src/email/email.service.ts

@@ -69,6 +69,7 @@ export class EmailService {
         .get("email.shareRecipientsMessage")
         .replaceAll("\\n", "\n")
         .replaceAll("{creator}", creator?.username ?? "Someone")
+        .replaceAll("{creatorEmail}", creator?.email ?? "")
         .replaceAll("{shareUrl}", shareUrl)
         .replaceAll("{desc}", description ?? "No description")
         .replaceAll(