feat: make lib no_std compatible

[sonicfromnewyoke]

Problem

sokoban library is already no_std friendly but still isn't no_std compatible

Summary of Changes

• use libc-print instead of println macro from std
• use foldhash::FixedState instead of DefaultHasher from std
• use const fn
• bump deps
• run clippy lint and apply suggestions

cc @jarry-xiao