Adds 'outlook calendargroup add' command. Closes #7103

[MartinM85]

Closes #7103

[Copilot]

Pull request overview

This PR adds a new Outlook workload command to the CLI for Microsoft 365 to create Microsoft Graph calendar groups for the signed-in user or a specified user, aligning with the requested outlook calendargroup add functionality in issue #7103.

Changes:

• Introduces the outlook calendargroup add Graph command implementation with Zod-based option validation and delegated/app-only behavior.
• Adds a full test suite covering validation, permission-mode behavior, and OData error handling.
• Updates documentation (command reference + sidebar navigation) and registers the new command constant.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/m365/outlook/commands/calendargroup/calendargroup-add.ts	Implements the new calendargroup add Graph command with schema validation and permission-mode handling.
src/m365/outlook/commands/calendargroup/calendargroup-add.spec.ts	Adds unit tests for validation rules, request URL construction, permission scenarios, and error handling.
src/m365/outlook/commands.ts	Registers the CALENDARGROUP_ADD command name constant.
docs/src/config/sidebars.ts	Adds the new command doc page to the Outlook calendargroup sidebar section.
docs/docs/cmd/outlook/calendargroup/calendargroup-add.mdx	Adds the command reference documentation, including options, permissions, examples, and response formats.

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