Add raygui build to build.zig

build.zig.zon

@@ -11,6 +11,11 @@
             .hash = "N-V-__8AALShqgXkvqYU6f__FrA22SMWmi2TXCJjNTO1m8XJ",
             .lazy = true,
         },
+        .raygui = .{
+            .url = "git+https://github.com/raysan5/raygui#3b2855842ab578a034f827c38cf8f62c042fc983",
+            .hash = "N-V-__8AAHvybwBw1kyBGn0BW_s1RqIpycNjLf_XbE-fpLUF",
+            .lazy = true,
+        },
         .emsdk = .{
             .url = "git+https://github.com/emscripten-core/emsdk#4.0.9",
             .hash = "N-V-__8AAJl1DwBezhYo_VE6f53mPVm00R-Fk28NPW7P14EQ",
@@ -18,6 +23,7 @@
         .zemscripten = .{
             .url = "git+https://github.com/zig-gamedev/zemscripten#3fa4b778852226c7346bdcc3c1486e875a9a6d02",
             .hash = "zemscripten-0.2.0-dev-sRlDqApRAACspTbAZnuNKWIzfWzSYgYkb2nWAXZ-tqqt",
+            .lazy = true,
         },
     },