feat(rlcd): Waveshare ESP32-S3-RLCD-4.2 support on latest main

- ST7305 driver with persistent 15KB DMA buffer (fix use-after-free +
  WDT lockup that caused freeze after flash)
- Reset timing fix: 150ms after reset, 50ms after init
- DTS: i2s0 mclk 16, bclk 9, ws 45, out 8, in 10 - fixes GPIO5 conflict
- i2c0 uses esp32-i2c-master, SDMMC 1-bit
- device.properties: colorDepth 16, fontSize 20, DefaultDark
- Amp GPIO46 init in initBoot
- Buttons: two-button control GPIO18 (cycle) + GPIO0 (select)

Base: origin/main f9453d89

Devices/waveshare-esp32-s3-rlcd/device.properties

@@ -0,0 +1,26 @@
+general.vendor=WaveShare
+general.name=ESP32-S3-RLCD-4.2
+general.incubating=true
+
+apps.launcherAppId=Launcher
+# apps.autoStartAppId=ApWebServer
+
+hardware.target=ESP32S3
+hardware.flashSize=16MB
+hardware.spiRam=true
+hardware.spiRamMode=OCT
+hardware.spiRamSpeed=120M
+hardware.tinyUsb=true
+hardware.esptoolFlashFreq=120M
+hardware.bluetooth=true
+
+storage.userDataLocation=SD
+
+display.size=4.2"
+display.shape=rectangle
+display.dpi=120
+
+lvgl.colorDepth=16
+lvgl.uiDensity=compact
+lvgl.fontSize=20
+lvgl.theme=DefaultDark