🦀 bions-rust vague 1 : 6 briques build-your-own-x — on ne les rebuild plus jamais

Principe RS-7 : « dès qu'on build un truc, plus personne n'a à le rebuild —
la seule chose à faire est l'optimisation. » (nexus/RepoVerse)
- bion-vc      : horloges vectorielles + MvReg fork-visible (LA spec
                 xion-relativiste-v0 enfin codée — CRDT testé par permutations)
- bion-triplet : l'Adressage Génératif (gen_hash BLAKE3, coords, résidu ;
                 résidu vide quand déjà-su ; align décidable au bit)
- bion-tsoinlog: journal append-only rejouable (CRC32 maison, crash-recovery)
- bion-kv      : magasin clé-valeur bitcask (compaction atomique, tombstones)
- bion-regex   : moteur Thompson NFA linéaire (jamais exponentiel — Russ Cox)
- bion-git     : mini-git content-addressed (SHA-1 maison + vecteurs officiels,
                 branches divergentes = le fork visible)
129 tests verts, clippy 0 warning, doc française = chaque bion est un cours.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

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