READING-LIST.md: root view of the whole ISAP list with file links (tools/make_rootlist.py)

User request: one big list at repo root mirroring isapzurich.com/en/library/reading-list —
every book with links to ALL downloaded files, INCLUDING cross-section books (link always
resolves to the canonical section's file, tagged →secNN; per user: link every time the
book is mentioned, even if downloaded in an earlier section).

- 483 positions (12 sections), 566 files, 1234 links, 0 broken (verified)
- sources: sections/NN/INDEX.md (items) + downloads/NN/MANIFEST.md (files) + cards (RU title)
- resolves: per-item blocks, xref rows (secNN #MM), legacy 5-col rows (| EN | file | …),
  legacy prose «Файлы: `path`» rows, glob xref rows (04-cw9-archetypes-*), card-name drift
  (sec07 INDEX) by item-number prefix
- manifest fixes found while building: sec08/10/11 'files in sec??' headings → '0 files'
  (23 blocks, paid/absent files), sec12 #03 xref row gained #19, sec11 #13 → 0 files
- AGENTS.md: layout line + total corrected (483 positions, 566 files)

CANON question answered: the new manifest canon (09-12 style) is exactly what makes this
generator possible; sec01-08 were migrated to it in the previous commit.

downloads/12-practical-case/MANIFEST.md

@@ -21,7 +21,7 @@ CW16 сам (EN pdf + RU fb2 гл.) — files in sec02 #08.
 | 02-alister-contemporary-jungian-en-2024.epub | 8.1 MB | lg f/104871697 (ed 148158310) | 46 pp, «CONTENTS… IAN ALISTER AND CHRISTOPHER HAUKE» ✓ (2nd ed. 2024; 6.2MB-твин = 21-pp chapter preview — удалён) |
 
 ### 03 — The Abandoned Child Within — files in sec09
-| — (cross-ref sec09: see Cross-references) | | 09 | |
+| — (cross-ref sec09 #19: EN pdf 42MB) | | 09 | |
 ### 04 — “The Case of Joan” (in Cambridge Companion to Jung) — 3 files
 
 | file | size | source | verify |