Add widget display name to improve logging

Signed-off-by: AnErrupTion <anerruption@disroot.org>

src/tui/Widget.zig

@@ -12,10 +12,12 @@ const VTable = struct {
 };
 
 id: u64,
+display_name: []const u8,
 pointer: *anyopaque,
 vtable: VTable,
 
 pub fn init(
+    display_name: []const u8,
     pointer: anytype,
     comptime deinit_fn: ?fn (ptr: @TypeOf(pointer)) void,
     comptime realloc_fn: ?fn (ptr: @TypeOf(pointer)) anyerror!void,
@@ -86,6 +88,7 @@ pub fn init(
 
     return .{
         .id = @intFromPtr(Impl.vtable.draw_fn),
+        .display_name = display_name,
         .pointer = pointer,
         .vtable = Impl.vtable,
     };