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/README.md

@@ -8,8 +8,8 @@ its own header.
 - **[INDEX.md](INDEX.md)** — every document in the repository, with its status.
 - **[DEAD-AND-REVISED.md](DEAD-AND-REVISED.md)** — the ideas that were abandoned, and the claims
   that were revised, each with the date and where the decision is recorded.
-- **[DELETE-CANDIDATES.md](DELETE-CANDIDATES.md)** — duplicates proposed for deletion, awaiting a
-  ruling.
+- **[DELETE-CANDIDATES.md](DELETE-CANDIDATES.md)** — what was deleted as duplicate, and why
+  (2026-10-14).
 
 ## What to believe
 
@@ -60,8 +60,6 @@ Where two documents disagree, the one higher in this table wins, and code wins o
 - **[pptx/](pptx/)** — slide decks for different audiences.
 - **[patent/](patent/)** — provisional patent material. **Legal hold: ask Captain Bob before
   touching anything here** (also `formal/patent/`, `formal/scraps/legal/`, `working/legal/`).
-- `lithosananke/hal/` — the last of the old `lithosananke/` folder: duplicates of the dead HAL
-  contract, listed in DELETE-CANDIDATES.md.
 
 ## Adding a document