chore: overwrite yargs version and migrate to cpy-cli

Author: RomainLanz

package.json

@@ -53,7 +53,7 @@
     "@release-it/conventional-changelog": "^10.0.5",
     "@types/node": "~24.11.0",
     "c8": "^11.0.0",
-    "copyfiles": "^2.4.1",
+    "cpy-cli": "^7.0.0",
     "del-cli": "^7.0.0",
     "eslint": "^9.39.2",
     "prettier": "^3.8.1",
@@ -74,6 +74,11 @@
       "optional": true
     }
   },
+  "overrides": {
+    "c8": {
+      "yargs": "^18.0.0"
+    }
+  },
   "author": "Romain Lanz <romain.lanz@pm.me>",
   "license": "MIT",
   "keywords": [