Switch away from nonboard for nostr login

frontend/src/global.d.ts

@@ -1,8 +1,22 @@
 import type { IStaticMethods } from "preline"
 
 declare global {
+  interface NostrNip07 {
+    getPublicKey(): Promise<string>
+    signEvent(event: unknown): Promise<unknown>
+    nip04?: {
+      encrypt(pubkey: string, plaintext: string): Promise<string>
+      decrypt(pubkey: string, ciphertext: string): Promise<string>
+    }
+    nip44?: {
+      encrypt(pubkey: string, plaintext: string): Promise<string>
+      decrypt(pubkey: string, ciphertext: string): Promise<string>
+    }
+  }
+
   interface Window {
     HSStaticMethods: IStaticMethods
+    nostr?: NostrNip07
   }
 }