[FEATURE] 'enhancement to existing module' template.

[adamrtalbot]

Is your feature request related to a problem? Please describe

There should be a way of requesting a module update/feature enhancement on here. E.g., module A offers support for this thing but currently the nf-core module does not support it.

Describe the solution you'd like

A template such as the ones for FEATURE or MODULE, with the following text boxes:

• Which module(s)
• Required updates or features, with appropriate example if necessary
• Existing solutions or similar examples

Describe alternatives you've considered

Free form text into issue request, using the other templates and fudging it together. Alternatively if an existing template is more appropriate, change the wording to make it fit better.

Additional context

No response