Addition of New Autoblog Workflows

We've added a few new Autoblog workflow cases. These include:

• Fantasy Story: Craft a fantasy story involving a protagonist who goes on a quest or adventure, facing various challenges and overcoming them with courage, cleverness, or kindness.

• Investment Blog: Create a blog focusing on various investment opportunities such as stocks, bonds, mutual funds, real estate, and cryptocurrencies.

• Narrative Essay: Craft an essay that tells a story on a topic by sharing experiences and insights in a way that resonates with readers.