feat: record the uae4all working directory

RetroPie starts UAE4All2 with pushd $md_inst, the directory whose
kickstarts folder it links to BIOS/amiga. The scriptmodule reader now
emits that working directory as it does for DraStic.

platforms/retropie.yml

@@ -1181,6 +1181,15 @@ launchers:
   fails_when_missing: false
   depends_on_option: "[[ ! -f \"$biosdir/aros-amiga-m68k-ext.bin\" ]]"
   source_ref: "scriptmodules/emulators/uae4all.sh:85"
+- emulator: uae4all
+  package: uae4all
+  build: standalone
+  kind: passes_path
+  names: []
+  search_dir: $md_inst
+  passes_to: working directory of $romdir/amiga/+Start UAE4All.sh
+  fails_when_missing: false
+  source_ref: "scriptmodules/emulators/uae4all.sh:90"
 - emulator: uae4arm
   package: uae4arm
   repo: "git https://github.com/Chips-fr/uae4arm-rpi.git master"

scripts/scraper/retropie_launchers.py

@@ -49,9 +49,10 @@ OUTSIDE_BIOS: dict[str, tuple[str, ...]] = {
 }
 
 # Packages whose emulator reads its system files below the working directory
-# the generated launch script enters with pushd, a folder outside $biosdir:
-# DraStic opens system/<name> under it. Each must still pushd.
-WORKING_DIRECTORY: tuple[str, ...] = ("drastic",)
+# the generated launch script enters with pushd: DraStic opens system/<name>
+# under it, UAE4All2 kickstarts/<name> (its launchDir is getcwd()). Each must
+# still pushd.
+WORKING_DIRECTORY: tuple[str, ...] = ("drastic", "uae4all")
 
 _FUNCTION = re.compile(r"^function\s+([\w.+-]+)\s*\(\)\s*\{\s*$")
 _ASSIGN = re.compile(r"^(?:local\s+)?([A-Za-z_]\w*)=(.*)$")