0.5: UI Revamp

Numerous updates to Explore and Setup pages with many contributions from @jzhang621

Highlights:

• Explore page redesign with better filtering UX and more screen real estate for the map
• Setup process redesign, step-by-step
• More options for cluster labeling from huggingface, ollama or custom URLs
• Starting to support Sparse Autoencoder features

See closed milestone issues:
https://github.com/enjalot/latent-scope/issues?q=is%3Aissue+milestone%3A0.5+is%3Aclosed

Some more writing on the changes here:
https://enjalot.substack.com/p/hidden-states-and-latent-scope-05