Added .nc and related commands.

You can set pixel colors (and text) on a 500x350 canvas, pepega version of r/place
You use currency to set pixels.
see whole canvas: .nc
set pixel: .ncsp <pos> <color> <text?>
get pixel: .ncp <pos>
zoom: .ncz <pos> or .ncz x y

src/NadekoBot/Db/Models/NCanvas/NCanvas.cs

@@ -0,0 +1,19 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace NadekoBot.Db.Models;
+
+public class NCPixel
+{
+    [Key]
+    public int Id { get; set; }
+    
+    public required int Position { get; init; }
+
+    public required long Price { get; init; }
+
+    public required ulong OwnerId { get; init; }
+    public required uint Color { get; init; }
+
+    [MaxLength(256)]
+    public required string Text { get; init; }
+}