anvil_reset RPC - Lower Priority

## Issue summary

`anvil_reset(string: rpcURL, string?: blockNumber)`
**summary**: fork remote network from provided rpc url and a block number as a checkpoint. Reset the fork to a fresh forked state, and optionally update the fork config.

## Other information and links

-

Start by locating the RPC entry points for anvil_reset and the code that manages remote forks and fork configuration. Read how existing RPC methods reset or update state, then verify that the requested URL and optional block number produce a fresh fork and that configuration updates are applied.

Written by the indexing model from the issue text.