Add EDAM ontologies for input and output channels in `meta.yml`

The EDAM ontology (https://edamontology.org) is a well established set of of ontology keywords for use in bioinformatics.

It would be great to have EDAM identifiers associated with channel inputs and outputs, to have a rich identification of the type of data that they contain. This is more extensive than just filename, for example there are multiple ontologies for different flavours of .fasta files.

It should be possible to have multiple ontologies associated. We should also future-proof to allow multiple ontologies in the future. Example syntax:

tools:
  - mytool:
    - ontologies:
      - edam: http://edamontology.org/format_1929
      - edam: …

This addition should also come with CLI helper functionality to make it easy for developers to search for terms and select them via nf-core/tools.

Once #5830 is complete, we should be able to fetch tool EDAM ontologies to generate a shortlist to pick from.

Start with the repository's meta.yml format and the existing nf-core/tools CLI entry points. Review the EDAM ontology at https://edamontology.org and issue #5830 to understand how tool ontologies can provide a shortlist. Done means channel inputs and outputs can hold multiple EDAM identifiers, and the CLI can search for and select terms.