RAMClustR: Add filtering, qc and plots for related steps

[hechth]

Add the options to save plots generated with RAMClustR in a collection of PDFs

The filtering part creates the MSData output - the filtering section should also be made available in the wrapper with 2 options:

• blank
• cv
  both of them being a boolean and both can be selected.

If blank is selected, the parameters for the function need to be added (qc.tag, blank.tag, signal_to_noise (sn) and remove.blanks (boolean)).
None means that the filtering is disabled.
CV requires a qc.tag and a cv value (coefficient of variation).
The order of execution is filtering blanks < normalization < filtering cv.

The filtering step creates the following output

The rc.qc. function should be added - this should be added as a boolean.
It is executed as last step of the workflow.
The rc.qc function creates the following output :