adding object base

src/vulkan/lib.zig

@@ -0,0 +1,8 @@
+const std = @import("std");
+
+pub const Instance = @import("Instance.zig");
+pub const PhysicalDevice = @import("PhysicalDevice.zig");
+
+test {
+    std.testing.refAllDeclsRecursive(@This());
+}