Refactor code structure and create build command

package.json

@@ -5,12 +5,16 @@
   "main": "index.ts",
   "scripts": {
     "app": "tsx src/index.ts",
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "build": "tsc && tsc-alias"    
+  },
+  "bin": {
+    "oh-import": "./dist/index.js"
   },
   "author": "Bartłomiej Pluta",
   "license": "ISC",
   "devDependencies": {
     "@types/node": "^22.9.0",
+    "tsc-alias": "^1.8.10",
     "tsx": "^4.19.2",
     "typescript": "^5.6.3"
   },