scripts: add wine prefix setup script

Idempotent helper that copies the client to a writable location,
creates a fresh Wine prefix, and installs the required winetricks verbs
(vcrun2022, d3dx9, corefonts, tahoma). Re-running on an existing target
skips already-done steps.

scripts/setup-wine-prefix.sh

@@ -0,0 +1,97 @@
+#!/usr/bin/env bash
+# Set up a Wine prefix for running the Metin2 client on Linux.
+# Idempotent: re-running on an existing prefix skips steps that are already done.
+#
+# Usage:
+#   ./scripts/setup-wine-prefix.sh <source-client-dir> <target-dir>
+#
+# Example:
+#   ./scripts/setup-wine-prefix.sh /mnt/windows_c/Users/me/metin/client ~/metin-wine
+#
+# Result layout:
+#   <target-dir>/client/   — writable copy of the client deploy folder
+#   <target-dir>/prefix/   — Wine prefix with required runtime deps installed
+
+set -euo pipefail
+
+if [[ $# -lt 2 ]]; then
+	echo "usage: $0 <source-client-dir> <target-dir>" >&2
+	echo "  source-client-dir: path containing Metin2.exe, assets/, pack/, etc." >&2
+	echo "  target-dir:        directory to create (holds client/ and prefix/)" >&2
+	exit 2
+fi
+
+SRC=$1
+DEST=$2
+
+if [[ ! -f "$SRC/Metin2.exe" && ! -f "$SRC/Metin2_Debug.exe" ]]; then
+	echo "error: $SRC does not look like a client folder (no Metin2.exe or Metin2_Debug.exe)" >&2
+	exit 1
+fi
+
+for tool in wine winetricks; do
+	if ! command -v "$tool" >/dev/null 2>&1; then
+		echo "error: $tool not found in PATH. Install it via your package manager." >&2
+		exit 1
+	fi
+done
+
+CLIENT_DIR=$DEST/client
+PREFIX_DIR=$DEST/prefix
+
+mkdir -p "$DEST"
+
+if [[ -d "$CLIENT_DIR" && -f "$CLIENT_DIR/Metin2.exe" ]] || [[ -d "$CLIENT_DIR" && -f "$CLIENT_DIR/Metin2_Debug.exe" ]]; then
+	echo "[1/3] client already present at $CLIENT_DIR, skipping copy"
+else
+	echo "[1/3] copying client from $SRC to $CLIENT_DIR (this can take a minute)"
+	cp -a "$SRC" "$CLIENT_DIR"
+fi
+
+export WINEPREFIX=$PREFIX_DIR
+export WINEARCH=win64
+
+if [[ -f "$PREFIX_DIR/system.reg" ]]; then
+	echo "[2/3] wine prefix already exists at $PREFIX_DIR, skipping wineboot"
+else
+	echo "[2/3] creating wine prefix at $PREFIX_DIR"
+	mkdir -p "$PREFIX_DIR"
+	wineboot --init >/dev/null 2>&1 || true
+fi
+
+# vcrun2022   — MSVC 2015-2022 runtime, required because the client is an MSVC build
+# d3dx9       — D3DX9 helper DLLs (Wine implements d3d9 but not the d3dx9 helpers)
+# corefonts   — Arial/Courier/Times/etc., needed by some UI elements
+# tahoma      — the client hard-codes Tahoma as the UI font; without it, all text renders invisibly
+VERBS=(vcrun2022 d3dx9 corefonts tahoma)
+TO_INSTALL=()
+for v in "${VERBS[@]}"; do
+	case $v in
+		vcrun2022)
+			if [[ -f "$PREFIX_DIR/drive_c/windows/system32/msvcp140.dll" ]]; then continue; fi ;;
+		d3dx9)
+			if [[ -f "$PREFIX_DIR/drive_c/windows/system32/d3dx9_43.dll" ]]; then continue; fi ;;
+		corefonts)
+			if [[ -f "$PREFIX_DIR/drive_c/windows/Fonts/arial.ttf" ]]; then continue; fi ;;
+		tahoma)
+			if [[ -f "$PREFIX_DIR/drive_c/windows/Fonts/tahoma.ttf" ]]; then continue; fi ;;
+	esac
+	TO_INSTALL+=("$v")
+done
+
+if [[ ${#TO_INSTALL[@]} -eq 0 ]]; then
+	echo "[3/3] all winetricks verbs already installed"
+else
+	echo "[3/3] installing winetricks verbs: ${TO_INSTALL[*]}"
+	winetricks -q "${TO_INSTALL[@]}"
+fi
+
+echo
+echo "done. to launch:"
+echo
+echo "  cd $CLIENT_DIR"
+echo "  WINEPREFIX=$PREFIX_DIR wine Metin2.exe"
+echo
+echo "or with verbose client logging:"
+echo
+echo "  WINEPREFIX=$PREFIX_DIR WINEDEBUG=-all,+err,+seh wine Metin2_Debug.exe"