Metin2 game client (P0–P11) + mobile asset pipeline

Networked client on the existing Godot 4.7 + libgr2 renderer:
- net: m2dev wire protocol (libsodium KX + XChaCha20), auth/select/game
  phases, EntityStore world model, ~all GC/CG headers. char create/delete,
  private shop / mall / cube, SHOP_GC_START_EX, guild, party (+ CG_PARTY_SET_STATE),
  quests, dragon soul, refine, safebox, exchange.
- UI: in-game windows migrated 1:1 from the reference uiscript/root .py —
  char status (/stat), inventory+equipment, select-item ([SELECT_ITEM] quest
  token), system-option + game-option + ESC system menu, private-shop 39-grid,
  party info board, shop tabs, atlas, minimap, quickbar, chat, …
- EterGrnLib polish: GR2 material blend/two-sided, LOD crossfade, motion-event
  dispatch, contact shadow, ray-AABB picking, weapon grip pre-transform.

Portable asset IO (A1) — all extension/libgr2/formats/mtproto reads routed
through godot::FileAccess (res:// PCK works on iOS/Android); standalone-lib
*_path() kept for the non-Godot CTests. AssetResolver + PropertyRegistry
switched to a baked index (bake_asset_index.gd) instead of std::filesystem.

Mobile builds: build-{android,ios}.sh, export-android.sh, pack-assets.sh,
gen-debug-keystore.sh. Assets ship as a zip mounted at runtime by
project/asset_pack.gd (adb push now; HTTP download is a drop-in later).

ctest 10/10, 34 GDScript suites, macOS/iOS/Android all build.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013EJxkHiNKS4kybHS3XKyAJ

formats/textscript.h

@@ -0,0 +1,27 @@
+// Metin2 文本脚本（.msa / .msm / 各种 .txt）—— token 树解析。
+// 语法：空白分隔 token；`key value...` 行；`Group Name { ... }` 块；`"quoted"` 串；`#` 到行尾注释。
+// 照 EterBase/CTextFileLoader + EterLib CTokenVector 的效果。M2 T1。
+#pragma once
+#include <string>
+#include <vector>
+
+namespace fmt {
+
+struct Node {
+    std::string name;                 // Group 名（根节点为空）
+    std::vector<std::vector<std::string>> lines;   // 非 Group 行：token 列表（[0]=key）
+    std::vector<Node> groups;         // 子 Group
+
+    // 便捷取值（在本节点的 lines 里找 key，大小写不敏感）
+    const std::vector<std::string>* find(const char* key) const;
+    std::string str(const char* key, const std::string& def = "") const;   // 取第 1 个值（去引号）
+    float       num(const char* key, float def = 0) const;
+    int         inum(const char* key, int def = 0) const;
+    const Node* group(const char* name) const;
+};
+
+// 解析整段文本。失败返回 false 并写 err。
+bool parse_textscript(const std::string& text, Node& root, std::string* err);
+bool parse_textscript_file(const std::string& path, Node& root, std::string* err);
+
+} // namespace fmt