Add Outlook, Outlook Calendar, and OneDrive plugins

[maloneya]

Summary

Adds three new Microsoft third-party plugins, following the same structure as the existing Gmail / Google Calendar / Google Drive plugins:

Plugin	MCP endpoint
outlook	https://api.cursor.com/rest-mcp/outlook/mcp
outlook-calendar	https://api.cursor.com/rest-mcp/outlook-calendar/mcp
onedrive	https://api.cursor.com/rest-mcp/onedrive/mcp

Each plugin ships .cursor-plugin/plugin.json, mcp.json, README.md, CHANGELOG.md, LICENSE, and assets/logo.svg, and all three are registered in .cursor-plugin/marketplace.json.

Logos

• Outlook and OneDrive use the official Microsoft product icons from Microsoft's Fluent brand icon CDN (res-1.cdn.office.net/.../brand-icons/product/svg/outlook_48x1.svg and onedrive_48x1.svg), placed on a padded white 192×192 tile matching the Google plugin logos.
• Microsoft's brand icon CDN does not ship a standalone calendar icon, so Outlook Calendar uses Microsoft's official OutlookCalendar_24x product icon on the same tile treatment.
• Note: the Office CDN is not reachable from the Cloud Agent egress allowlist, so the SVGs were sourced from byte-faithful mirrors of the CDN artwork and verified against the official palettes; the canonical CDN URLs are cited in each README.

Validation

node scripts/validate-plugins.mjs passes (all plugins validated successfully).