Expand Outlook Calendar plugin skills and positioning

[caseychow-oai]

Summary

• broaden the Outlook Calendar plugin metadata to cover scheduling, daily briefs, meeting prep, and Outlook-specific status semantics
• add focused workflow skills for daily briefs, freeing up time, group scheduling, and meeting prep
• strengthen the core Outlook Calendar skill around calendar selection, shared-calendar visibility, Teams details, attendee responses, and Outlook-native scheduling cues

Testing

• Not run (not requested)

[Aismit]

i like it

The merge-base changed after approval.