docs: Add alpha warning

site/docs/04-graphics/04.6-nineslice.mdx

@@ -4,6 +4,12 @@ slug: /nineslice
 section: Graphics
 ---
 
+:::warning
+
+🧪 Available in the v0.30.0 Alpha
+
+:::
+
 ## Overview
 
 The NineSlice is a Graphic which uses a 2D technique allowing for reuse of an image at various sizes without needing to prepare multiple assets. The process includes taking an input sprite texture, and splitting it into 9 sections, which then can be repainted in a new sprite texture without scaling or distorting the texture. This is very useful in game development for UI panels or buttons or textured platforms.
@@ -20,7 +26,7 @@ Then based on your output parameters specified it will 'redraw' this texture to
 
 You can set parameters under `sourceConfig` properties to control the margins. This lets you dial in where the module 'slices' your texture up. For example, with the example 64 pixel x 64 pixel sprite, we can set the top/bottom margins to 5 pixels, and the left/right margins to 6 pixels to get this slicing.
 
-![sliced ](sliced.png)
+![sliced](sliced.png)
 
 ## Configuration