Support viem client directly for provider + bundler client

[KONFeature]

Describe the feature you would like

It would be cool if we could reuse an existing viem client for both the provider, and the bundler client (providing directly a BundlerClient for a given chain, like the getBundlerClient).

Something like:
new RhinestoneSDK({ clientFactory: (chainId) => ... , bundlerClientFactory: (chainId) => ... })

It would help support other bundler / paymaster than pimlico & alchemy, and also (my use case), use the same transport for the 3 (everything under an eRPC instance, doing caching, rate limiting and LB across multiple providers) + support fallbacks and all the cool stuff from viem.

I can work on it and submit a PR if you want

Additional context

No response

[Destiner]

Yeah that makes sense. Basically, reuse the existing viem transports for chains and bundlers.

I think the cleanest approach would be to extend the existing provider and bundler properties by adding a custom or transport type in addition to the existing, predefined types like Alchemy.