feat: InspectEvm fn renames, inspector docs, book cleanup

[rakita]

• _previous api was not renamed until now (aka inspect_commit_previous to inspect_replay_commit)
• Added docs for Inspector crate
• book cleaned up, some things removed, architecture part improved
• fixed unknown index.html in book.

[codspeed-hq]

CodSpeed Performance Report

Merging #2275 will not alter performance

_{Comparing rakita/renames_cleanup (8656cb9) with main (bba246d)}

Summary

✅ 8 untouched benchmarks