Add zlib license

Author: Jafagervik

LICENSE

@@ -0,0 +1,17 @@
+Copyright (c) 2025 Viktor Brum
+
+This software is provided 'as-is', without any express or implied
+warranty. In no event will the authors be held liable for any damages
+arising from the use of this software.
+
+Permission is granted to anyone to use this software for any purpose,
+including commercial applications, and to alter it and redistribute it
+freely, subject to the following restrictions:
+
+1. The origin of this software must not be misrepresented; you must not
+   claim that you wrote the original software. If you use this software
+   in a product, an acknowledgment in the product documentation would be
+   appreciated but is not required.
+2. Altered source versions must be plainly marked as such, and must not be
+   misrepresented as being the original software.
+3. This notice may not be removed or altered from any source distribution.

build.zig.zon

@@ -11,7 +11,7 @@
         "build.zig.zon",
         "src",
         // For example...
-        //"LICENSE",
+        "LICENSE",
         "README.md",
     },
 }