✨ 添加TypeScript实现的API签名工具，包括项目配置、命令行工具、核心库及相关文档，支持多种签名算法和环境变量配置。

typescript/tsconfig.json

@@ -0,0 +1,14 @@
+{
+  "compilerOptions": {
+    "target": "es2019",
+    "module": "commonjs",
+    "declaration": true,
+    "outDir": "./dist",
+    "strict": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true
+  },
+  "include": ["src"],
+  "exclude": ["node_modules", "dist", "**/*.test.ts"]
+}