Describe the feature

This will handle providing state from an external store. This is specific to a block number, so we don't handle fallback logic here.

Example: https://github.com/paradigmxyz/reth/blob/8e488a730a13ee94d158ed2e36627788b1902cc4/crates/chain-state/src/memory_overlay.rs#L34

Example: https://github.com/meyer9/proof-helper/blob/e398f0b31707b6ae2d25096c9c826a7412a006c5/src/provider.rs#L7

Additional context

No response