构建脚本依赖不再打开 shared-contracts 的 ts-bindings

- Cargo.toml：`[build-dependencies]` 的 shared-contracts 去掉 `features = ["ts-bindings"]`，只保留 `[dependencies]` 那份。
- build.rs 只用 `GameCreationAppAgentGroup` 与 `new_game_creation_app_seed_tasks`，不需要 ts-rs 导出，没必要让构建脚本图额外编译 ts-rs。

apps/ai-game-creator-shell/src-tauri/Cargo.toml

@@ -14,7 +14,7 @@ cocos-editor-injection = ["cocos-editor-execute", "cocos-editor-bridge/windows-i
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 sha2 = "0.10"
-shared-contracts = { path = "../../../server-rs/crates/shared-contracts", default-features = false, features = ["ts-bindings"] }
+shared-contracts = { path = "../../../server-rs/crates/shared-contracts", default-features = false }
 tauri-build = { version = "2.6.2", features = [] }
 
 [dependencies]