Add existing project files to Git

tsup.config.ts

@@ -0,0 +1,10 @@
+import { defineConfig } from "tsup";
+ 
+export default defineConfig({
+    format: ['cjs', 'esm'],
+    entry: ['./src/index.ts'],
+    dts: true,
+    shims: true,
+    skipNodeModulesBundle: true,
+    clean: true,
+});