chore(mods): classify 11 new distribution mods

Distribution added 11 jars. classify-mods.py seeds all as `both`
(none declare CLIENT in neoforge.mods.toml). Hand-flip the two
pure-client cosmetic ones so sync-server-mods.sh drops them:

- ExtremeSoundMuffler: client-side sound muffling UI
- ToastControl: client-side toast popup suppression

Rest stay `both` — Placebo/moonlight/caelus are libs, and
amendments/etched/fishingoverhaul/immersive_paintings/
createornithopterglider/emotecraft add server-side content or sync.

Also map iris as `client`. It is referenced by distribution.json but
absent from the local (gitignored) dist jar dir, so classify-mods.py
never sees it; mapping it keeps mods-sides.json aligned with the
manifest. Client-only, so the sync selection is unchanged.

server-mods/ now 130 jars (was 123).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

mods-sides.json

@@ -11,6 +11,7 @@
   "EasyMagic-v21.1.4-1.21.1-NeoForge.jar": "both",
   "EnderStorage-1.21.1-2.13.0.191.jar": "both",
   "ExplorersCompass-1.21.1-3.4.0-neoforge.jar": "both",
+  "ExtremeSoundMuffler-3.56_NeoForge-1.21.jar": "client",
   "FarmersDelight-1.21.1-1.3.2.jar": "both",
   "HangGlider-v21.1.0-1.21.1-NeoForge.jar": "both",
   "ImmediatelyFast-NeoForge-1.6.10+1.21.1.jar": "client",
@@ -27,9 +28,11 @@
   "Necronomicon-NeoForge-1.6.0+1.21.jar": "both",
   "Patchouli-1.21.1-93-NEOFORGE.jar": "both",
   "Ping-Wheel-1.12.2-neoforge-1.21.1.jar": "both",
+  "Placebo-1.21.1-9.9.1.jar": "both",
   "PuzzlesLib-v21.1.51-1.21.1-NeoForge.jar": "both",
   "Searchables-neoforge-1.21.1-1.0.2.jar": "client",
   "TerraBlender-neoforge-1.21.1-4.1.0.8.jar": "both",
+  "ToastControl-1.21.1-9.0.1.jar": "client",
   "TravelersTitles-1.21.1-NeoForge-5.1.3.jar": "client",
   "UsefulSlime-neoforge-1.21-1.12.1.jar": "both",
   "YungsApi-1.21.1-NeoForge-5.1.6.jar": "both",
@@ -45,11 +48,13 @@
   "YungsBetterWitchHuts-1.21.1-NeoForge-4.1.1.jar": "both",
   "YungsBridges-1.21.1-NeoForge-5.1.1.jar": "both",
   "YungsCaveBiomes-1.21.1-NeoForge-3.1.1.jar": "both",
+  "amendments-neoforge-1.21-2.1.5.jar": "both",
   "appleskin-neoforge-mc1.21-3.0.9.jar": "client",
   "architectury-13.0.8-neoforge.jar": "both",
   "baguettelib-1.21.1-NeoForge-2.0.3.jar": "both",
   "balm-neoforge-1.21.1-21.0.58.jar": "both",
   "buildinggadgets2-1.3.9.jar": "both",
+  "caelus-neoforge-7.0.1+1.21.1.jar": "both",
   "cardboardboxes-1.21.1-0.1.2.jar": "both",
   "charginggadgets-1.14.1.jar": "both",
   "cloth-config-15.0.140-neoforge.jar": "both",
@@ -71,6 +76,7 @@
   "create_mechanical_spawner-1.21.1-1.3.0-6.0.8.jar": "both",
   "createaddition-1.6.0.jar": "both",
   "createdeco-2.1.3.jar": "both",
+  "createornithopterglider-1.2.0-1.21.1.jar": "both",
   "createsifter-1.21.1-2.2.1.jar": "both",
   "createultimine-1.21.1-neoforge-1.3.2.jar": "both",
   "curios-neoforge-9.5.1+1.21.1.jar": "both",
@@ -80,13 +86,16 @@
   "easy-piglins-neoforge-1.21.1-1.1.0.jar": "both",
   "easy-villagers-neoforge-1.21.1-1.1.42.jar": "both",
   "easydisenchanting-neoforge-1.0.0-1.21.1.jar": "both",
+  "emotecraft-for-MC1.21.1-2.4.12-neoforge.jar": "both",
   "enderrf-1.21.1-1.0.1.jar": "both",
   "entity_model_features-3.2.4-1.21-neoforge.jar": "client",
   "entity_texture_features_1.21-neoforge-7.1.jar": "client",
   "entityculling-neoforge-1.10.2-mc1.21.1.jar": "client",
+  "etched-5.1.0.jar": "both",
   "fancymenu_neoforge_3.9.1_MC_1.21.1.jar": "client",
   "fastleafdecay-35.jar": "both",
   "ferritecore-7.0.3-neoforge.jar": "both",
+  "fishingoverhaul-1.21.1-1.2.1.jar": "both",
   "ftb-chunks-neoforge-2101.1.17.jar": "both",
   "ftb-essentials-neoforge-2101.1.9.jar": "both",
   "ftb-library-neoforge-2101.1.31.jar": "both",
@@ -97,7 +106,9 @@
   "fzzy_config-0.7.6+1.21+neoforge.jar": "both",
   "geckolib-neoforge-1.21.1-4.8.4.jar": "both",
   "handcrafted-neoforge-1.21.1-4.0.3.jar": "both",
+  "immersive_paintings-neoforge-1.21.1-0.7.8.jar": "both",
   "inventoryessentials-neoforge-1.21.1-21.1.15.jar": "both",
+  "iris-neoforge-1.8.12+mc1.21.1.jar": "client",
   "jamlib-neoforge-1.3.6+1.21.1.jar": "both",
   "jei-1.21.1-neoforge-19.27.0.340.jar": "both",
   "konkrete_neoforge_1.9.9_MC_1.21.jar": "client",
@@ -116,6 +127,7 @@
   "mob_grinding_utils-1.1.10+mc1.21.1.jar": "both",
   "modernfix-neoforge-5.27.12+mc1.21.1.jar": "both",
   "moogs_structures-neoforge-1.21.1-3.0.0.jar": "both",
+  "moonlight-neoforge-1.21.1-3.0.22.jar": "both",
   "morefunctionalstorage-1.2.3.jar": "both",
   "moreoverlays-1.24.2-mc1.21.1-neoforge.jar": "client",
   "polymorph-neoforge-1.1.0+1.21.1.jar": "both",