feat(rules): encode SRD spell components for all 108 registry spells

- Every data/spells/*.json now carries a "components" field with the
  V/S/M/F/DF tokens from its KB Components line (material/focus
  descriptions dropped; M/DF and F/DF alternatives kept verbatim).
- 107/108 encoded. Create Alcool (data/spells/create_alcool.json) is
  left without the field: it is a homebrew cantrip (level 0) with no KB
  entry - the closest real spell, Enhance Water (Inner Sea Gods, V, S),
  is already a separate registry entry.
- summon_monster_i/ii map to the KB's numeric files (summon-monster-1/2);
  hidden_diplomacy maps to its KB name Egorian Diplomacy (same spell,
  Spymaster's Handbook rename): V, S, M.
- tests/test_spell_failure.py: the placeholder asserting the registry was
  not yet encoded is replaced by an encoded-state smoke test (all spells
  but Create Alcool declare components; five spot-checks against the SRD
  stat blocks). Golden transcripts unchanged: the component gates still
  need deafened/ASF conditions no golden combat has.

data/spells/darkness.json

@@ -2,6 +2,7 @@
   "name": "Darkness",
   "level": 2,
   "school": "evocation",
+  "components": "V, M/DF",
   "range": "touch",
   "save": "none",
   "base_dc": 10,