Graz wallet interface support

[grod220]

Ibc.fun has become one of the canonical ways that cosmos users do multi-chain asset transfers. It even extends into Solana and Base. Under the hood, it uses Graz to manage wallet connections. The library acts as a kind of aggregator for wallets to unify the API for web frontends and expose react-hooks for easy consumption.

While the Graz wallet interface does not match our protocol, we can put Prax-specific implementations behind those calls. This will allow Ibc.fun to integrate with Prax.

While signatures are not relevant, we should prioritize implementing:

• Wallet connection requests
• Wallet disconnect requests
• Get address
• Wallet state

This may require implementing #1093 first.

[TalDerei]

closing as implemented in #1943