Add Undo-TfsGitRepositoryRemoval cmdlet for restoring repositories from Recycle Bin

[Copilot]

This PR adds support for restoring Git repositories from the Recycle Bin through a new Undo-TfsGitRepositoryRemoval cmdlet, similar to the existing Undo-TfsTeamProjectRemoval functionality.

What's Added

• New Cmdlet: Undo-TfsGitRepositoryRemoval that restores deleted Git repositories
• API Integration: Uses Azure DevOps REST API v7.1 endpoint for repository restoration
• Multiple Input Types: Supports GitRepository objects, GitRepositoryRef objects, and repository GUIDs
• Basic Tests: Unit tests following the existing test patterns

Usage Examples

# Restore by repository ID
Undo-TfsGitRepositoryRemoval -Repository "5db56f26-27b9-44a1-b906-814d03982840" -Project "MyProject"

# Restore by GitRepository object (piped from another command)
$deletedRepo | Undo-TfsGitRepositoryRemoval

# Use -WhatIf to preview the operation
Undo-TfsGitRepositoryRemoval -Repository $repoId -Project $project -WhatIf

Implementation Details

• Follows Established Patterns: Uses the same structure and approach as Undo-TfsTeamProjectRemoval
• REST API Call: PATCH /{project}/_apis/git/repositories/{repositoryId}/recycleBin with {"deleted": false}
• Safety Features: Includes ShouldProcess support for confirmation prompts
• Error Handling: Meaningful error messages for invalid inputs
• Minimal Changes: 126 lines added, 0 lines deleted

API Reference

The implementation follows the Azure DevOps REST API documentation for restoring repositories from the recycle bin.

Fixes #242.

[!WARNING]

Firewall rules blocked me from connecting to one or more addresses

I tried to connect to the following addresses, but was blocked by firewall rules:

• http://www.microsoft.com:80/pkiops/crl/Microsoft%20Identity%20Verification%20Root%20Certificate%20Authority%202020.crl
  • Triggering command: dotnet build TfsCmdlets.sln (http block)
• http://www.microsoft.com:80/pkiops/crl/Microsoft%20Public%20RSA%20Timestamping%20CA%202020.crl
  • Triggering command: dotnet build TfsCmdlets.sln (http block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to my firewall allow list

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