add scope more channel_count

[hsb689]

scope = sgl_scope_create(parent);
sgl_obj_set_pos(scope, 90, 160);
sgl_obj_set_size(scope, 200, 100);

// 设置为 2 通道模式
sgl_scope_set_channel_count(scope, 2);

// 为每个通道设置数据缓冲区
sgl_scope_set_channel_data_buffer(scope, 0, scope_buffer1, SGL_ARRAY_SIZE(scope_buffer1));
sgl_scope_set_channel_data_buffer(scope, 1, scope_buffer2, SGL_ARRAY_SIZE(scope_buffer2));

// 设置通道颜色（通道 0 为绿色，通道 1 为红色）
sgl_scope_set_channel_waveform_color(scope, 0, sgl_rgb(0, 255, 0));
sgl_scope_set_channel_waveform_color(scope, 1, sgl_rgb(255, 0, 0));

sgl_scope_set_bg_color(scope, sgl_rgb(26, 26, 26));
sgl_scope_set_line_width(scope, 1); // 设置线条宽度为 1 像素
sgl_scope_enable_auto_scale(scope, 1);
//sgl_scope_set_range(scope, 0, 10000);
sgl_scope_set_max_display_points(scope, 100); // 设置最大显示点数为 100
sgl_scope_set_alpha(scope, 200);
sgl_scope_set_grid_color(scope, sgl_rgb(127, 50, 50));    // 浅灰色网格线
sgl_scope_show_y_labels(scope, 1);// 显示 Y 轴标签
sgl_scope_set_y_label_font(scope, &ChironGoRoundTC_700B_12);
sgl_scope_set_y_label_color(scope, sgl_rgb(150, 150, 150));