refactor/some core files to .ts + update some imports in commands

package.json

@@ -29,6 +29,7 @@
         "winston": "^3.8.1"
     },
     "devDependencies": {
+        "@types/concat-stream": "^2.0.3",
         "@types/node": "^24.5.2",
         "@typescript-eslint/eslint-plugin": "^8.44.1",
         "@typescript-eslint/parser": "^8.44.1",