Phase 9: Iris and Complementary Reimagined, off by default

Adrian, 2026-11-09: set up the shader but keep it disabled by default. Iris
1.8.14-beta.1 (built for the pack's Sodium 0.8.13) and Complementary Reimagined
r5.9.3, both client only and fetched from Modrinth. Default Options' extra
folder ships config/iris.properties with shaders off and Complementary
preselected, copied only when a player has none. Toggle Shaders is on M, the
only free letter; Iris's other keys are unbound. tools/build.py fails if the
settings name a shader file the pack doesn't install.

Smoke test passes; client dependencies are satisfied. Not launched on a client.

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

docs/addon-status.md

@@ -61,6 +61,8 @@ JEI declares Minecraft `[1.21, 1.21.1)` in every 1.21.1 build, which a strict re
 | Cobblemon Quests Reloaded (FTB Quests integration, fork) | 8 | 2.0.2+1.8 (CF `9148242`, project `1389481`) | **CF only** | ✅ Declares Cobblemon `[1.8.0,)`, FTB Quests `[2101.0.0,)`. **In the pack** (2026-11-03, Adrian). Adds the task type `cobblemon_tasks:cobblemon_task` (catch, defeat, evolve, level up, obtain, seen, …); self-test `quests_have_cobblemon_tasks`. Bundles a MongoDB client for an optional storage backend, off by default (`useMongo: false`, localhost) |
 | Cobblemon Info for REI / JEI / EMI | 8 | 2.32.14+neoforge (MR `bxd0xXZI`) | MR | ✅ Declares Cobblemon `[1.7.1,)`. **In the pack** (2026-11-03, Adrian), on both sides: it reads the server's live spawn pool (the pack's zone pools); a client on a server without it falls back to Cobblemon's own spawn files. Shows spawns, drops, evolutions; doesn't know the pack's zone rule, so it lists a spawn's biomes, not its zone. Self-test `jei_addon_shows_island_spawns` |
 | Quests & Teams Fixes (flexible-mode soft-lock fix) | 8 | — | MR | ❌ Only 1.20.1 builds exist. Test the soft-lock on FTB Quests 2101.1.37 ourselves |
+| Iris Shaders | 9 | 1.8.14-beta.1+1.21.1-neoforge (MR `KduFYu4t`) | MR + CF | n/a (no Cobblemon dependency). **In the pack** (2026-11-09), client only. A beta, and the only NeoForge 1.21.1 build for Sodium 0.8; built against the pack's Sodium 0.8.13 |
+| Complementary Reimagined (shader pack) | 9 | r5.9.3 (MR `Bqen1mJX`) | MR + CF | n/a. **In the pack** (2026-11-09), off by default; client only |
 | spark | 9 | 1.10.124 (MR `v5qtqRQi`, CF `6225208`) | MR + CF | n/a |
 
 ## Prior art and references (study only, never installed)