Code formatting improvement in the display initialization function

**Code formatting improvement** in the display initialization function:
- Reformatted a compressed one-liner containing RGB screen test code into properly structured, readable lines
- Split the color test sequence (RED → GREEN → BLUE) across multiple lines with preserved comments and delays

- **No functional changes** - the code behavior remains identical
- **Improved readability** - the color test sequence is now easier to understand and maintain
- **Better debugging** - individual test steps are clearly visible, making it easier to modify or troubleshoot the display initialization routine

sketches/doorbell-touch-esp32-32e/DisplayDriverGFX.cpp

@@ -38,7 +38,15 @@ void Gfx::init() {
     return;
   }
   Serial.printf("[GFX] Display OK: %dx%d\n", SCREEN_WIDTH, SCREEN_HEIGHT);
-_gfx->fillScreen(0xF800); // RED TEST  delay(2000);  _gfx->fillScreen(0x07E0); // GREEN TEST  delay(2000);  _gfx->fillScreen(0x001F); // BLUE TEST  delay(2000);
+  _gfx->fillScreen(0xF800); 
+  // RED TEST  
+  delay(2000);
+  _gfx->fillScreen(0x07E0); 
+  // GREEN TEST  
+   delay(2000);  
+   _gfx->fillScreen(0x001F); 
+   // BLUE TEST  
+   delay(2000);
 }
 
 void Gfx::setRotation(uint8_t r)  { if (_gfx) _gfx->setRotation(r); }