Create a button and show a list of maintenance windows on a `k-info-panel`

[viniarck]

• The UI should provide a new k-info-panel component to list maintenance windows from GET /maintenace endpoint
• List all maintenance windows in a sortable table with searchable rows on each column
• status value should be shown with their numeric and string value 0 - pending, 1 - running, 2 - finished
• All attributes of maintenance should be shown id, description, start, end, and items
• The picture below tries to illustrate what's expected, it's the part 2) and 3) in yellow, notice though that most of the data in the image is from mef_eline, it turns out was easier to get a sample to illustrate the layout of the components as well
• For a reference, in terms of source code, mef_eline UI has implemented similar components

[viniarck]

This feature was implemented on PR #43