Rename configs to config

Due to incompatibility with the mapping service directories, and to avoid confusion and keep consistent, I would propose a renaming of the `configs` directory. Testing this on a local copy of the repository and mapping service worked without issues.

All references to `configs` should be changed to `config`, and in the mapping service the JaMMaTo config files can simply be copied to the mapping service config directory.

This is due to the `os.getcwd()` not being the directory from which the script is run, but the parent directory of the mapping service, which already has its own `config` directory. Whether this is a bug or intended behaviour I don't yet know, but as an interim solution I will create this separate issue and associated branch, then we can discuss and investigate what is going on.

Search the repository for references to the `configs` directory and inspect how `os.getcwd()` determines paths in the mapping service. Confirm the JaMMaTo config files can be used from the mapping service's `config` directory, update every reference, and verify the mapping service works from a local checkout.

Written by the indexing model from the issue text.