Add Ashfall to Dialog Result Box Context

Add Interop.hasTea, checks player inventory for a specific tea type
Add hot/cold shader

Data Files/MWSE/mods/mer/ashfall/effects/shader.lua

@@ -0,0 +1,19 @@
+local common = require("mer.ashfall.common.common")
+
+local shader
+
+---@return mgeShaderHandle | { temperature: number }
+local function getShader()
+    shader = mgeShadersConfig.load{ name = "ashfall"}
+    return shader
+end
+
+event.register("load", function()
+    local shader = getShader()
+    shader.enabled = true
+end)
+
+event.register("Ashfall:UpdateHud", function()
+    local shader = getShader()
+    shader.temperature = common.data.temp
+end)