Add coder information to the configuration file

Add a new field to the configuration file with the name of the coders who work on the current project. Here is a possible scheme for inclusion in config.yml:

coders:
  - name: Bart Simpson
    email: bart@simpson.mail
    last-time: 2024-07-10 10:34:23
  - name: Lisa Simpson
    email: lisa@simpson.mail
    last-time: 2024-07-11 11:43:32

This would imply a change in the FORMAT version. Note that this would not introduce any backward incompatibility, since the presence of the coders field is not mandatory (i.e. it will be read, if present, and created, if necessary). We might consider changing the specification of the FORMAT version, allowing it to be major.minor. Only when backward incompatibilities are introduced, will the major number be incremented, otherwise the minor number will be incremented.

For processing the version string, use semanticversion.