feat: add config view for lvgl.

Signed-off-by: Bo <boironic@gmail.com>

main/display/display.h

@@ -2,18 +2,25 @@
 
 #include <stdint.h>
 #include <stdbool.h>
+#include <stddef.h>
 #include "esp_err.h"
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
+#define DISPLAY_WIDTH 320
+#define DISPLAY_HEIGHT 172
+
 esp_err_t display_init(void);
 void display_show_banner(void);
 void display_set_backlight_percent(uint8_t percent);
 uint8_t display_get_backlight_percent(void);
 void display_cycle_backlight(void);
 bool display_get_banner_center_rgb(uint8_t *r, uint8_t *g, uint8_t *b);
+void display_show_config_screen(const char *qr_text, const char *ip_text,
+                                const char **lines, size_t line_count, size_t scroll,
+                                size_t selected, int selected_offset_px);
 
 #ifdef __cplusplus
 }