docs: the 12 duplicates deleted; README rewritten to the system as it is

Captain Bob's rulings, 2026-10-14: "delete" -- the duplicates listed in
DELETE-CANDIDATES.md are removed (the list stays as the record; the
formal tier's provenance comments repointed at the maintained copies) --
and "rewrite" the README: v2.1.0, the Tripod as Hera/Artemis/Hestia,
kernel-Hermes, identities on thumbdrives, the corrected ACL overhead,
1052-test POST and the current parity line, keyboards and storage, board
images carrying both systems and how to switch, and docs/README.md as
the way in.  The book is left as it is, to be reworked later.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/formal/cookbook/main.tex

@@ -100,7 +100,7 @@
 \part{Security and ACL Recipes}
 
 \chapter{Word-Level ACL Basics}
-%% SOURCE: docs/working/architecture/03-architecture/word-acl/DESIGN.md
+%% SOURCE: docs/reference/word-acl/DESIGN.md
 %% TODO(bob): promote ACL recipe: loading ACL.4th, granting/revoking modes,
 %% TTL-based expiry. Do NOT draft independent claim language.
 \input{../scraps/architecture/03-architecture/word-acl/DESIGN}