* enhance `babel.sh` script
* remove broken config items from `babel.ini`
* add translations entrypoint

* to eliminate the necessity to remember and manually enter the URL
  every time

* apparently, the previous config-based approach stopped working

* also add `uv.lock` to gitignore
* remove `package.json` from gitignore, because hatchling bases its
  default list of ignore/include files on the VCS ignore files