Clarify what happened on successful upsert

[zackproser]

On successful upsert, we currently show:

• N results

Like this:

I think this feature is awesome, but it could be more clear what happened. Something like:

N results successfully converted to embeddings and upserted to your Pinecone index: ${process.env.PINECONE_INDEX}

[zackproser]

By the way, it might be a nice change to also add a fetching, crawling, scraping, etc state to the frontend app.

Currently, the button only says "embed and upsert" so it's less clear that the app is actually:

• Reading from a web page
• Converting that text into embeddings
• Upserting the embeddings to Pinecone, etc.

A lower lift that could accomplish the same end goal would be a sentence or two of descriptive text above the "embed and upsert" button explaining what the app is doing when you click that button?