[Feature Request]: Reporter - include a statistic table from the "Variable Browser" in the report

### Feature description

Currently the Reporter in "Variable Browser" module includes only a plot in a report. Would be nice to include a statistic table below the plot in the report too.

For other modules, it seems that there is no such issue - both a plot and a statistic table are included. Another improvement here would be to print the statistic table in a nicer format using {kable} package.

### Code of Conduct

- [X] I agree to follow this project's Code of Conduct.

### Contribution Guidelines

- [X] I agree to follow this project's Contribution Guidelines.

### Security Policy

- [X] I agree to follow this project's Security Policy.

Start at the Variable Browser Reporter entry point and compare how other modules add both plots and statistic tables to reports. Check the existing report-generation tests, if present, and confirm that the completed report includes the Variable Browser statistic table below the plot with the requested formatting.

Written by the indexing model from the issue text.