Next release checklist

[Shnatsel]

• Port to a SIMD library that plays well with multiversioning, e.g. Port to fearless_simd #58
• Improve bit reversal performance PoC: BRAVO bit reversal #62
• Investigate performance drop when not using -C target-cpu=native; perf diff blames phastft::algorithms::cobra::bit_rev so hopefully Port to fearless_simd #58 takes care of it
• Deprecate or remove unused stuff like COBRA, DiF, etc.