added pack.json for iris folder mod

Author: woopSmile

shaders/pack.json

@@ -0,0 +1,5 @@
+{
+  "name": "TerraFirmaGreg-Shaders-Complementary",
+  "shaderDescription": "\u00A74Complementary Shaders r5.7.1 \u00A7r+ \u00A7cEuphoria Patches 1.8.6 \u00A7r+ \u00A7eSupplemental patches \u00A7rModified tastefully to fit the \u00A7aTerraFirmaGreg \u00A7fmodpack and all his mods!",
+  "version": "3.1.1"
+}