feat: add access-list read-set prewarm primitive

[KaiCode2]

Summary

Adds a generic cache-owned eth_createAccessList read-set primitive so downstream crates can warm a call's storage footprint through EvmCache without carrying a second provider/RPC handle.

Change

• Add AccessListCall plus create_access_list_read_set(...) with pinned-block baseFee gas pricing and null-tolerant storageKeys decoding.
• Add AccessListFetchFn, EvmCache::access_list_fetcher, set_access_list_fetcher, and prewarm_access_list_call.
• Route the second shot through EvmCache::prewarm_slots, so callers reuse the cache's configured bulk/point-read storage fetcher.
• Add an offline unit test proving the cache-owned fetcher path warms storage through injected cache fetchers.

Verification

• cargo fmt --check
• cargo check --lib
• cargo test --lib prewarm_access_list_call_uses_cache_owned_fetchers