Create setPalette.md

Author: DeveloperTryingToCodeLikeOtherOfThem

docs/reference/images/setPalette.md

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+## Set Palette
+Sets the screen's palette.
+
+``` sig
+    image.setPalette(null);
+```
+
+A color is formed by 3 indices of a buffer.
+
+The buffer's size requires to be 48 because
+of the engine's 16 colors.
+
+## Example
+Replace the screen palette's first color.
+
+``` ts
+    const buf = Buffer.create(48); 
+    // color 0
+    buf[0] = 11; // 0
+    buf[1] = 90; // 0 
+    buf[2] = 100; // 0
+```