new module: samtools/calmd

[jfy133]

I think it would be good to have a module for samtools/calmd

• [ ] This module does not exist yet with the nf-core modules list command
• [ ] There is no open pull request for this module
• [ ] There is no open issue for this module
• [ ] If I'm planning to work on this module, I added myself to the Assignees to facilitate tracking who is working on the module