Add work_get_team_days_off tool

[DiegoCarrillo95]

Summary

Implement a new tool that integrates with the Azure DevOps Work API to retrieve team-level days off for a specific iteration. The existing work_get_team_capacity tool only returns individual member days off — team-wide days off (holidays, company shutdowns) that apply to all members are not exposed.

Tools

Develop the following tool with full parameter support, including optional ones:

work_get_team_days_off: Get team-level days off for a specific iteration. These days off apply to the whole team.

Endpoint: GET https://dev.azure.com/{organization}/{project}/{team}/_apis/work/teamsettings/iterations/{iterationId}/teamdaysoff?api-version=7.1

[danhellem]

This is not likely going to happen as another. We may need to update the existing capacity tool to support days off