fix(packaging): Update package metadata: add exports, mark package public; clean up README contributing section

package.json

@@ -3,8 +3,9 @@
   "version": "2.0.1",
   "private": false,
   "description": "A library for node inter process communication, providing an easy-to-use API for IPC.",
-  "main": "dist/index.js",
-  "typings": "dist/index.d.ts",
+  "exports": {
+    ".": "./dist_ts/index.js"
+  },
   "author": "Lossless GmbH",
   "license": "MIT",
   "scripts": {