feat: update BetterLeaves wiki for 9.3

src/pages/wiki/betterleaves.mdx

@@ -9,6 +9,7 @@ import { Icon } from 'astro-icon/components'
 import { Notification } from 'accessible-astro-components'
 import CustomTabs from "../../components/CustomTabs.astro"
 import Difficulty from "../../components/Difficulty.astro"
+import BlurryDivider from "../../components/BlurryDivider.astro"
 import pythonCodeImage from '../../assets/betterleaves/script.png';
 import ingameImage from '../../assets/betterleaves/ingame.png';
 
@@ -133,6 +134,70 @@ In these cases, you unfortunately have to manually configure exceptions in the /
     "dynamicTreesNamespaces": {
         "minecraft": "dynamictrees",
         "aether": "dtaether"
+    },
+    // Force-generate (non-bushy) item models for various blocks
+    "generateItemModels": [
+        "biomesoplenty:rainbow_birch_leaves",
+        "betterend:lacugrove_leaves"
+    ],
+    // Specify blocks that share the same models
+    "blockStateCopies": {
+        "minecraft:oak_leaves": [
+            "twilightforest:twilight_oak_leaves",
+            "dynamictrees:oak_undergrowth_leaves"
+        ]
+    },
+    // A list of textures that will not be treated as leaf blocks (useful for texture stitching)
+    "compileOnly": [
+      "minecraft:block/snow"
+    ]
+}
+```
+<BlurryDivider />
+## The .betterleaves.json format
+
+### Block States <Difficulty difficulty="advanced" />
+Sometimes, you want models to only apply to specific block states.
+
+This is also useful in cases where you want to combine multiple leaf variant textures into a single blockstate file (in that case, set state to "").
+`input/assets/eternal_starlight/northland_leaves.betterleaves.json`:
+```json
+{
+    "blockStateData": {
+        "block": "eternal_starlight:northland_leaves",
+        "state": "snowy=false"
     }
 }
 ```
+
+### Sprite Overrides <Difficulty difficulty="advanced" />
+You can override the sprites used in the model. Currently, top and bottom faces of the leaf model will default to the regular texture, but can be overridden this way.
+
+`input/assets/eternal_starlight/northland_leaves_snowy.betterleaves.json`:
+```json
+{
+    "spriteOverrides": {
+        "top": "minecraft:block/snow",
+        "bottom": "eternal_starlight:block/northland_leaves"
+    }
+    ...
+}
+```
+
+### Texture Stitching <Difficulty difficulty="hard" />
+Some leaves have textures that consist of different halves – for example Blue Wisteria Leaves from Environmental.
+This is where texture stitching comes in.
+<center><img style="image-rendering: pixelated" alt="Showcase of the texture stitching layout" src="/betterleaves/demo_blue_wisteria_leaves_top.png" width="400"></img></center>
+<p class="text-center italic">Texture stitching allows you to use custom sub-textures while generating the bushy texture</p>
+
+`input/assets/environmental/blue_wisteria_leaves_top.betterleaves.json`:
+```json
+{
+    "textureStitching": {
+        "1-3": "environmental:block/wisteria_leaves",
+        // Unspecified parts will use the regular leaf texture
+        "7-9": "environmental:block/blue_wisteria_leaves"
+    }
+    ...
+}
+```