fix: 装备属性面板避让逻辑 + 多项功能更新

- item_tooltip_view.gd: 新增 avoid_rect 属性，tooltip 与装备窗口重叠时自动推到左侧
- inventory_ui.gd: 悬停装备时传入窗口矩形作为避让区域
- 包含其他累积的功能开发和测试文件

build-debug/extension/third_party/zstd-build/lib/libzstd.pc

@@ -0,0 +1,16 @@
+#   ZSTD - standard compression algorithm
+#   Copyright (c) Meta Platforms, Inc. and affiliates.
+#   BSD 2-Clause License (https://opensource.org/licenses/bsd-license.php)
+
+prefix=/usr/local
+exec_prefix=${prefix}
+includedir=${prefix}/include
+libdir=${exec_prefix}/lib
+
+Name: zstd
+Description: fast lossless compression algorithm library
+URL: https://facebook.github.io/zstd/
+Version: 1.5.6
+Libs: -L${libdir} -lzstd
+Libs.private: 
+Cflags: -I${includedir}