refactor(opengl): 优化UTF-8解码并使用simdutf库

替换手动UTF-8解码逻辑为simdutf库实现，提高解码效率和代码可维护性
同时清理头文件中不必要的include并统一代码格式

Extra2D/include/extra2d/graphics/backends/opengl/gl_context.h

@@ -1,7 +1,6 @@
 #pragma once
 
 #include <glad/glad.h>
-#include <cstdint>
 #include <string>
 
 namespace extra2d {

Extra2D/include/extra2d/graphics/backends/opengl/gl_sprite_batch.h

@@ -5,7 +5,6 @@
 #include <extra2d/graphics/batch/sprite_batch.h>
 #include <extra2d/graphics/shader/shader_interface.h>
 
-#include <array>
 #include <glad/glad.h>
 #include <vector>
 
@@ -32,7 +31,8 @@ public:
   void draw(const Texture &texture, const SpriteData &data);
 
   // 批量绘制（用于文本渲染优化）
-    void drawBatch(const Texture& texture, const std::vector<SpriteData>& sprites);
+  void drawBatch(const Texture &texture,
+                 const std::vector<SpriteData> &sprites);
 
   // 获取绘制调用次数
   uint32_t getDrawCallCount() const { return drawCallCount_; }

Extra2D/src/graphics/backends/opengl/gl_font_atlas.cpp

@@ -5,6 +5,7 @@
 #include <algorithm>
 #include <cstring>
 #include <fstream>
+#include <simdutf/simdutf.h>
 
 // 在实现文件中定义 STB 实现
 #define STB_TRUETYPE_IMPLEMENTATION
@@ -97,51 +98,18 @@ const Glyph *GLFontAtlas::getGlyph(char32_t codepoint) const {
 // 测量文本尺寸 - 支持多行文本
 // ============================================================================
 Vec2 GLFontAtlas::measureText(const std::string &text) {
-  float width = 0.0f;
   float maxWidth = 0.0f;
   float height = lineHeight_;
   float currentWidth = 0.0f;
 
-  for (size_t i = 0; i < text.length();) {
-    // 处理 UTF-8 编码
-    char32_t codepoint = 0;
-    unsigned char c = static_cast<unsigned char>(text[i]);
+  size_t utf32Length = simdutf::count_utf8(text.data(), text.size());
+  std::vector<char32_t> utf32Buffer(utf32Length);
+  size_t converted = simdutf::convert_utf8_to_utf32(text.data(), text.size(),
+                                                    utf32Buffer.data());
 
-    if ((c & 0x80) == 0) {
-      // 单字节 ASCII
-      codepoint = c;
-      i++;
-    } else if ((c & 0xE0) == 0xC0) {
-      // 2字节 UTF-8
-      if (i + 1 >= text.length())
-        break;
-      codepoint =
-          ((c & 0x1F) << 6) | (static_cast<unsigned char>(text[i + 1]) & 0x3F);
-      i += 2;
-    } else if ((c & 0xF0) == 0xE0) {
-      // 3字节 UTF-8
-      if (i + 2 >= text.length())
-        break;
-      codepoint = ((c & 0x0F) << 12) |
-                  ((static_cast<unsigned char>(text[i + 1]) & 0x3F) << 6) |
-                  (static_cast<unsigned char>(text[i + 2]) & 0x3F);
-      i += 3;
-    } else if ((c & 0xF8) == 0xF0) {
-      // 4字节 UTF-8
-      if (i + 3 >= text.length())
-        break;
-      codepoint = ((c & 0x07) << 18) |
-                  ((static_cast<unsigned char>(text[i + 1]) & 0x3F) << 12) |
-                  ((static_cast<unsigned char>(text[i + 2]) & 0x3F) << 6) |
-                  (static_cast<unsigned char>(text[i + 3]) & 0x3F);
-      i += 4;
-    } else {
-      // 无效的 UTF-8，跳过
-      i++;
-      continue;
-    }
+  for (size_t i = 0; i < converted; ++i) {
+    char32_t codepoint = utf32Buffer[i];
 
-    // 处理换行
     if (codepoint == '\n') {
       maxWidth = std::max(maxWidth, currentWidth);
       currentWidth = 0.0f;