mod(input): handle remaining key codes remove unused ones

src/app.zig

@@ -237,7 +237,7 @@ pub fn App(comptime E: type) type {
                                                     34 => input.F20,
                                                     // 200 => return .{ .event = .paste_start, .n = sequence.len },
                                                     // 201 => return .{ .event = .paste_end, .n = sequence.len },
-                                                    57427 => input.KpBegin,
+                                                    57399...57454 => |code| code,
                                                     else => unreachable,
                                                 };
                                             },