feat(mdns): restore mDNS + hostname kidsOS-XXXX

- Add espressif/mdns 1.3.2 to idf_component.yml + CMake
- STA path (esp32_wifi.cpp): set DHCP hostname kidsOS-XXXY from MAC,
  mdns_init, hostname, instance, _http:80 + _tactility:6666 services
- AP path (WebServerService.cpp): same hostname + mDNS for AP mode
- Log: mDNS AP/STA initialized hostname 'kidsOS-91ED.local'
- Previous implementation from 300ddb3a lost in driver arch migration
  f9453d89 (#562 #574)

Tested: RLCD 0x2d5470 FLASH_EXIT:0, log shows
  'mDNS AP initialized, hostname kidsOS-91ED.local'

Platforms/platform-esp32/CMakeLists.txt

@@ -6,7 +6,7 @@ idf_component_register(
     SRCS ${SOURCES}
     INCLUDE_DIRS "include/"
     PRIV_INCLUDE_DIRS "private/"
-    REQUIRES TactilityKernel driver esp_adc esp_driver_i2c esp_lcd vfs fatfs esp_wifi esp_netif esp_event
+    REQUIRES TactilityKernel driver esp_adc esp_driver_i2c esp_lcd vfs fatfs esp_wifi esp_netif esp_event mdns
 )
 
 if (DEFINED ENV{ESP_IDF_VERSION})