Add math

src/math.zig

@@ -0,0 +1,4 @@
+pub const Matrix4x4 = @import("math/Matrix4x4.zig").Matrix4x4;
+pub const Quaternion = @import("math/Quaternion.zig").Quaternion;
+pub const Vector3 = @import("math/Vector3.zig").Vector3;
+pub const Vector4 = @import("math/Vector4.zig").Vector4;