feat: detect handheld systems by their own files

AmberELEC, EmuELEC, JELOS, KOLOS, UnofficialOS, ArchR, PAN4ELEC, dArkOS,
RetroOZ, spruceOS, CrossMix-OS, Onion, Allium, Koriki, MiyooCFW and plumOS
are found by what their builds write, named as they name themselves, and
installed to the system_directory of their RetroArch config, which follows
ArkOS and dArkOS to a second card. TrimUI stock, MinUI and a plumOS build
without a known folder are named and not installed to. Two unrelated
systems matching stop a run without a terminal.

install.ps1

@@ -11,7 +11,7 @@
 
     $ErrorActionPreference = "Stop"
     $defaultInstallUrl = "https://raw.githubusercontent.com/Abdess/retrobios/main/install.py"
-    $defaultInstallSha256 = "fe8de4eda0919c268d4d2c0d571c7d0dc1cf675d7604263766f5f99a35aa3724"
+    $defaultInstallSha256 = "9fbee0f382ca68880697ed573b79ecc1ffca793a406a3f258dad16e40d2845d6"
     $maximumInstallerBytes = 2MB
     $installerExit = 0
     $installer = if ($PSScriptRoot) { Join-Path $PSScriptRoot "install.py" } else { $null }