Initiate data integration html report

[cbethell]

Please provide some background on the proposed additions or changes.

We want to add a html report template to the data integration module, similar to what we have in the clustering module.

What are the changes that you are proposing?

We should initiate the data integration html report template with the following:

• a table displaying the size of the dataset (number of cells in each library)
• UMAPs displaying the unintegrated and the integrated (for each of the provided methods) data

Please describe the proposed solution.

A integration-report-template.Rmd should be added to the optional-integration-analysis module to do the following:

• take the integrated SCE object as input
• generate a table with the number of cells within each library that has been integrated
• generate UMAPs with the unintegrated and integrated data

[cbethell]

Addressed by #364