feat: Explore page with snapshot spaces

[ChaituVR]

Summary

Closes: #297

• Explore page support for snapshot spaces
• Remove favorite button on all space cards

How to test

• Update .env with VITE_ENABLED_NETWORKS=s,eth,oeth,matic,arb1,sn
• Go to http://localhost:8080/#/explore
• You should see new protocol selection menu and spaces related to the protocol

[bonustrack]

Can we show the badges too on space preview for Snapshot spaces?

[bonustrack]

Also can we use abbreviation for proposal and vote counters on both S and SX space preview? With max 2 decimals like 652, 1.2m, 2.5k