refactor: full typescript migration (#174)

tsdown.config.ts

@@ -0,0 +1,12 @@
+import { defineConfig } from "tsdown";
+
+export default defineConfig({
+  entry: ["src/**/*.ts"],
+  outDir: "dist",
+  clean: true,
+  dts: {
+    resolve: true,
+  },
+  unbundle: true,
+  copy: ["src/generated"],
+});