chore(nostr-client): move dev scripts to dev/ folder

Move 9 development/testing .mjs scripts out of the package root into
dev/ to keep the published package clean. Update relative imports
and dev.sh reference.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/nostr-client/dev/fund-dev.mjs

@@ -8,7 +8,7 @@
  * Usage:
  *   VITE_ATM_PRIVATE_KEY=xxx VITE_LIGHTNING_PUB_PUBKEY=yyy node fund-dev.mjs [amount]
  */
-import { NostrClient, loadIdentityFromHex, encryptContent, decryptJSON } from './dist/index.js'
+import { NostrClient, loadIdentityFromHex, encryptContent, decryptJSON } from '../dist/index.js'
 import { finalizeEvent } from 'nostr-tools'
 import { randomUUID } from 'crypto'
 

packages/nostr-client/dev/test-pay.mjs

@@ -1,4 +1,4 @@
-import { NostrClient, loadIdentityFromHex, encryptContent, decryptJSON } from './dist/index.js'
+import { NostrClient, loadIdentityFromHex, encryptContent, decryptJSON } from '../dist/index.js'
 import { Relay } from 'nostr-tools/relay'
 import { finalizeEvent } from 'nostr-tools'
 import { randomUUID } from 'crypto'