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/licenses.md

@@ -45,6 +45,8 @@ Read each license before adding a mod, and add a row here in the same change.
 | Cobblemon HMs | shiero | shiero's Mods License (in the jar): free to use, also in free modpacks; any monetized use (paid pack, paid server perks) needs an agreement with the author | [Modrinth](https://modrinth.com/project/cobblemon-hms) | Phase 5: field moves (both). Also on [CurseForge](https://www.curseforge.com/projects/1587850), not linked in the pack yet |
 | Cobbreeding | Ludichat, Fuzuki | "MIT, no AI, no reupload" ([text](https://fuzuki.dev/~fuzuki/mit-no-ai-no-reupload.txt)): MIT terms, but the mod may not be used to train or improve machine-learning models, and may not be reuploaded unchanged to CurseForge or Modrinth except bundled in a modpack | [Modrinth](https://modrinth.com/mod/cobbreeding), [source](https://gitlab.com/ludichat/Cobbreeding) | Phase 5: breeding (both). Referenced only, never copied. Not on CurseForge by the authors' choice |
 | Cloth Config API | shedaniel | LGPL-3.0-only | [Modrinth](https://modrinth.com/mod/cloth-config) | Cobbreeding dependency (client) |
+| Iris Shaders | IrisShaders (coderbot, IMS and contributors) | LGPL-3.0-only | [Modrinth](https://modrinth.com/mod/iris) | Phase 9: runs shader packs (client) |
+| Complementary Shaders - Reimagined | EminGT (Complementary Development) | [Complementary License Agreement](https://github.com/ComplementaryDevelopment/ComplementaryReimagined/blob/main/License.txt) | [Modrinth](https://modrinth.com/shader/complementary-reimagined) | Phase 9: the included shader pack, off by default (client). Allowed in modpacks unmodified and only through Modrinth's or CurseForge's own systems, never as an uploaded file |
 | Cobblemon Quests Reloaded | WinterWolfSV (original); community fork | CC-BY-NC-4.0 (jar metadata; the CurseForge page says "custom", the fork keeps the original's non-commercial license) | [CurseForge](https://www.curseforge.com/minecraft/mc-mods/cobblemon-quest-reloaded) | Phase 8: Cobblemon task types for FTB Quests (both). Not on Modrinth. Non-commercial: fine for this free pack |
 | Cobblemon Info for REI / JEI / EMI | Akkiruk | MIT | [Modrinth](https://modrinth.com/project/qekxLrOP) | Phase 8: spawns, drops and evolutions in JEI (both) |
 | Regenerating Ore Veins | Stargazer | MIT (jar metadata) | [CurseForge](https://www.curseforge.com/minecraft/mc-mods/regenerating-ore-veins) | Phase 4: the only ore source besides chest loot (both). Not on Modrinth |