New board: Elecrow CrowPanel Advance 3.5" (#231)

- Implement CrowPanel Advance 3.5"
- New driver subproject: ILI9488
- New driver subproject: GT911
- Refactor T-Deck to use new driver subproject
- Fix for `flash.ps1`: don't set flash speed

Buildscripts/Flashing/flash.ps1

@@ -15,7 +15,7 @@ $jsonClean = $jsonClean -replace '[\=]', ' '
 cd Binaries
 $command = "esptool --port $port erase_flash"
 Invoke-Expression $command
-$command = "esptool --port $port -b 460800 write_flash $jsonClean"
+$command = "esptool --port $port write_flash $jsonClean"
 Invoke-Expression $command
 cd ..