Extend StatusChartData or create new widget to include also reason for Skipped tests

**Is your feature request related to a problem? Please describe.**
I am using **pytest** and I need a widget that contains also information regarding the reason of the skipped tests.

As I see, there are currently two widgets that contain the same data:
- severity.json (allure-generator/src/main/java/io/qameta/allure/severity/SeverityPlugin.java)
- status-chart.json (allure-generator/src/main/java/io/qameta/allure/status/StatusChartPlugin.java



**Describe the solution you'd like**
I need if possible a widget that besides the attributes included above to also contain the reason for the skipped tests.

**Describe alternatives you've considered**
The alternative would be if possible to extend StatusChartData to also include the reason for the Skipped tests.

Start with allure-generator/src/main/java/io/qameta/allure/severity/SeverityPlugin.java and allure-generator/src/main/java/io/qameta/allure/status/StatusChartPlugin.java to compare the existing widget data. Determine how skipped-test information is represented, then make the resulting widget or StatusChartData include the skipped-test reason; done means the generated data exposes that reason alongside the existing attributes.

Written by the indexing model from the issue text.