chore: 初始化glTF模型压缩工具包

添加了完整的项目配置、工具函数、纹理压缩与模型优化实现，以及文档说明

src/utils.ts

@@ -0,0 +1,65 @@
+import * as fs from 'fs';
+import * as path from 'path';
+
+export function showWarn(message: string) {
+  console.error('\x1b[33m%s\x1b[0m', `Warn: ${message}`);
+}
+
+export function showInfo(message: string) {
+  console.info('\x1b[32m%s\x1b[0m', message);
+}
+
+const GLTF_EXTENSIONS = new Set(['.gltf', '.glb']);
+
+export function isGLTFFile(filePath: string) {
+  return GLTF_EXTENSIONS.has(path.extname(filePath).toLowerCase());
+}
+
+export async function readFileJson(filePath: string): Promise<object> {
+  return new Promise((resolve, reject) => {
+    fs.readFile(filePath, { encoding: 'utf8' }, (error, content) => {
+      if (error) {
+        reject(error);
+        return;
+      }
+
+      resolve(JSON.parse(content));
+    });
+  });
+}
+
+export async function readFileBuffer(filePath: string): Promise<Buffer> {
+  return new Promise((resolve, reject) => {
+    fs.readFile(filePath, (error, content) => {
+      if (error) {
+        reject(error);
+        return;
+      }
+
+      resolve(content);
+    });
+  });
+}
+
+export async function writeFile(filePath: string, buffer: Buffer | string): Promise<string> {
+  return new Promise((resolve, reject) => {
+    const dirPath = path.dirname(filePath);
+    if (!fs.existsSync(dirPath)) {
+      fs.mkdirSync(dirPath, { recursive: true });
+    }
+
+    fs.writeFile(
+      filePath,
+      buffer,
+      typeof buffer === 'string' ? { encoding: 'utf8' } : {},
+      (error) => {
+        if (error) {
+          reject(error);
+          return;
+        }
+
+        resolve(filePath);
+      }
+    );
+  });
+}