refactor stub

src/nu/ImGui.zig

@@ -0,0 +1,20 @@
+//! all imgui code through this path
+
+const std = @import("std");
+
+const Self = @This();
+
+const Window = @import("Window.zig");
+const Render = @import("Render.zig");
+
+pub fn init(alloc: std.mem.Allocator, window: *Window, render: *Render) !Self {
+    _ = alloc;
+    _ = window;
+    _ = render;
+
+    return .{};
+}
+
+pub fn deinit(self: *Self) void {
+    _ = self;
+}