Added BlackTwist app (#493)

Update b.ts

Added BlackTwist app

Author: heymattiarighetti

resources/b.ts

@@ -186,6 +186,13 @@ export const resources: Resource[] = [
             'Black illustrations is a series of FREE digital designs of black people for your next online project. Free for commercial and personal use.',
         url: 'https://www.blackillustrations.com/',
     },
+    {
+        name: 'BlackTwist',
+        categories: ['Analytics', 'Marketing', 'Twitter'],
+        description:
+            'Build and monetize your audience on Threads. BlackTwist is the #1 social media assistant for Threads that helps you take your social growth to the next level.',
+        url: 'https://blacktwist.app',
+    },
     {
         name: 'Blisk',
         categories: ['Browser', 'Programming'],