Double Check Documentation is current & up2date with latest nf-core standards

[apeltzer]

Description of feature

Double Check Documentation is current & up2date with latest nf-core standards, in particular

• latest template
• all modules updated
• use nf-validation for samplesheet and parameters

### Tasks
- [x] Latest template
- [x] All modules updated
- [x] nf-validation for samplesheet and parameters

[atrigila]

nf-validation has been replaced by nf-schema. However, nf-schema is currently not supported by the nf-core tooling. Using this new plugin will break the linting and schema builder. Other pipelines are still using the nf-validation plugin (e.g. sarek). In Slack, I was told the migration will most likely occur when the new plugin is fully supported,