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 https://github.com/nf-core/oncoanalyser/issues/81

Initial discussion

1. https://github.com/nf-core/oncoanalyser/pull/29#discussion_r1697452230