add Nostr Nests embed (#377)

* add Nostr Nests embed

* remove wildcard

* fix import to match import convention

* always show link, but hide iframe when necessary

packages/app/src/Const.ts

@@ -147,3 +147,8 @@ export const TwitchRegex = /twitch.tv\/([a-z0-9_]+$)/i;
  */
 export const AppleMusicRegex =
   /music\.apple\.com\/([a-z]{2}\/)?(?:album|playlist)\/[\w\d-]+\/([.a-zA-Z0-9-]+)(?:\?i=\d+)?/i;
+
+/**
+ * Nostr Nests embed regex
+ */
+export const NostrNestsRegex = /nostrnests\.com\/[a-zA-Z0-9]+/i;