Add a manual entry for the windows

src/main/resources/assets/immersiveengineering/manual/autoload.json

@@ -49,6 +49,7 @@
       "posts_and_wallmounts",
       "scaffolding_and_ladders",
       "metal_constructions",
+      "windows",
       "engineered_lighting",
       "balloon"
     ]

src/main/resources/assets/immersiveengineering/manual/en_us/windows.txt

@@ -0,0 +1,5 @@
+Factory Windows
+The grime is obligatory
+<&window_recipes>Framed glass windows allow some natural light to make its way into the factory, so you don't have to rely on <link;engineered_lighting;lanterns> alone.<br>
+Frames made from Treated Wood are thicker, while Steel and Aluminium make for a thinner one.<br>
+Unlike normal glass panes, these windows can be placed horizontally in addition to vertically, to act as skylights!

src/main/resources/assets/immersiveengineering/manual/windows.json

@@ -0,0 +1,12 @@
+{
+  "window_recipes": {
+    "type": "crafting",
+    "recipes": [
+      [
+        "crafting/treated_window",
+        "crafting/steel_window",
+        "crafting/alu_window"
+      ]
+    ]
+  }
+}