make custom Anycubic touchscreen implementation an ExtUI module

Start migration to ExtUI module. We do not yet change much of the custom
logic, but this brings us closer to upstream and allows use of some
integration hooks with less patching required.

Marlin/src/MarlinCore.cpp

@@ -254,7 +254,7 @@
 
 // PATCH START: Knutwurst
 #if ENABLED(ANYCUBIC_TOUCHSCREEN)
-  #include "lcd/anycubic_touchscreen.h"
+  #include "lcd/extui/knutwurst/anycubic_touchscreen.h"
 #endif
 // PATCH END: Knutwurst
 
@@ -353,7 +353,7 @@ void startOrResumeJob() {
     TERN_(GCODE_REPEAT_MARKERS, repeat.reset());
     TERN_(CANCEL_OBJECTS, cancelable.reset());
     TERN_(LCD_SHOW_E_TOTAL, e_move_accumulator = 0);
-    #if ENABLED(SET_REMAINING_TIME)
+    #if BOTH(LCD_SET_PROGRESS_MANUALLY, USE_M73_REMAINING_TIME)
       ui.reset_remaining_time();
     #endif
   }
@@ -890,10 +890,6 @@ void idle(bool no_stepper_sleep/*=false*/) {
   TERN_(MAX7219_DEBUG, max7219.idle_tasks());
 
   // PATCH START: Knutwurst
-  #ifdef ANYCUBIC_TOUCHSCREEN
-    AnycubicTouchscreen.CommandScan();
-  #endif
-
   #ifdef ENDSTOP_BEEP
     EndstopBeep();
   #endif
@@ -1011,12 +1007,6 @@ void kill(FSTR_P const lcd_error/*=nullptr*/, FSTR_P const lcd_component/*=nullp
   // "Error:Printer halted. kill() called!"
   SERIAL_ERROR_MSG(STR_ERR_KILLED);
 
-  // PATCH START: Knutwurst
-  #ifdef ANYCUBIC_TOUCHSCREEN
-    AnycubicTouchscreen.KillTFT();
-  #endif
-  // PATCH END: Knutwurst
-
   #ifdef ACTION_ON_KILL
     hostui.kill();
   #endif
@@ -1292,12 +1282,6 @@ void setup() {
   #endif
   SERIAL_ECHOLNPGM("start");
 
-  // PATCH START: Knutwurst
-  #ifdef ANYCUBIC_TOUCHSCREEN
-    AnycubicTouchscreen.Setup();
-  #endif
-  // PATCH END: Knutwurst
-
   // Set up these pins early to prevent suicide
   #if HAS_KILL
     SETUP_LOG("KILL_PIN");
@@ -1796,13 +1780,6 @@ void loop() {
 
     endstops.event_handler();
 
-    // PATCH START: Knutwurst
-    idle();
-    #ifdef ANYCUBIC_TOUCHSCREEN
-      AnycubicTouchscreen.CommandScan();
-    #endif
-    // PATCH END: Knutwurst
-
     TERN_(HAS_TFT_LVGL_UI, printer_state_polling());
 
     TERN_(MARLIN_TEST_BUILD, runPeriodicTests());