including interface for nip07 (#403)

* including interface for nip07

* fix types for NIP-07

* including NIP-07 export to jsr

* fix readme about nip07

* including in nip7 interface an output signature compatible with the event returned by the signer

nip07.ts

@@ -0,0 +1,16 @@
+import { EventTemplate, NostrEvent } from './core.ts'
+import { RelayRecord } from './index.ts'
+
+export interface Nip07 {
+  getPublicKey(): Promise<string>
+  signEvent(event: EventTemplate): Promise<NostrEvent>
+  getRelays(): Promise<RelayRecord>
+  nip04?: {
+    encrypt(pubkey: string, plaintext: string): Promise<string>
+    ecrypt(pubkey: string, ciphertext: string): Promise<string>
+  }
+  nip44?: {
+    encrypt(pubkey: string, plaintext: string): Promise<string>
+    decrypt(pubkey: string, ciphertext: string): Promise<string>
+  }
+}