Implement basic sequence and alignment QC reporting

[scwatts]

Overview

• it may be useful for users to have more complete sequence and alignment QC metrics
• first we must determine appetite from nf-core community for this extension
• some alignment QC is already done as required by the Hartwig workflow (and other QC related to analysis)
• this piece of work is also related to Reintroduce MultiQC for workflow and analysis summary #81

Initial discussion

1. Initial release review [DO NOT MERGE] #29 (comment)