Read quality filtering for Nanopore data

[sofstam]

Description of feature

We need to add an optional complexity filtering step for Nanopore data.

What needs to be done:

• Investigate the available tools for Nanopore and implement/add it to nf-core/taxprofiler. https://github.com/B-UMMI/long-read-catalog.
• Filtlong is already implemented as a module.

This can be closed when:

• One of the tools (filtlong/nanofilt) has been merged to nf-core/taxprofiler

[jfy133]

I would just add filtling to begin, and we can add the other if you prefer it in later releases

[sofstam]

Sounds great!