Add comprehensive tags editing capabilities for all Key Vault item types

[Copilot]

This PR implements comprehensive tag editing functionality for Azure Key Vault Explorer, addressing the user request to "include the option to add/edit/delete tags" for Key Vault items.

Key Features

Universal Tags Editor Component

• Created a reusable TagsEditor control with intuitive add/remove functionality
• Real-time key-value pair editing with clean, user-friendly interface
• Automatic validation and filtering of empty/invalid tags
• Consistent experience across all Key Vault item types (secrets, keys, certificates)

Enhanced Property Dialogs

• Extended existing secret editing dialog to include tag management
• Created new property editing dialogs for Keys and Certificates
• Made the Edit button available for all item types (previously secrets-only)
• Proper handling of certificate-specific constraints (dates are read-only)

Service Layer Improvements

• Added missing UpdateCertificate method to VaultService
• Enhanced all update operations to properly handle tag modifications
• Full integration with Azure Key Vault SDK update methods

User Workflow

Users can now manage tags by:

1. Right-clicking any Key Vault item → Properties → Edit
2. Using the Tags Editor to add new tags with the "+ Add Tag" button
3. Editing existing tag keys/values inline
4. Removing unwanted tags with the "×" button
5. Applying changes to save modifications to Azure Key Vault

Technical Implementation

New Components:

• TagsEditor.axaml - Reusable tags editing control
• EditKeyVersion.axaml - Key property editing dialog
• EditCertificateVersion.axaml - Certificate property editing dialog
• EditKeyVersionViewModel.cs - Key editing business logic
• EditCertificateVersionViewModel.cs - Certificate editing business logic

Enhanced Components:

• Extended CreateNewSecretVersionViewModel with tag editing capabilities
• Updated PropertiesPageViewModel.EditVersion() to support all item types
• Enhanced VaultService with certificate property update functionality

This implementation provides a seamless, integrated experience for managing Key Vault item tags without requiring users to switch to the Azure Portal.

Fixes #100.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

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

• av-build-tel-api-v1.avaloniaui.net
  • Triggering command: dotnet exec --runtimeconfig /home/REDACTED/.nuget/packages/avalonia.buildservices/0.0.31/tools/netstandard2.0/runtimeconfig.json /home/REDACTED/.nuget/packages/avalonia.buildservices/0.0.31/tools/netstandard2.0/Avalonia.BuildServices.Collector.dll (dns 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 the custom allowlist in this repository's Copilot coding agent settings (admins only)

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

[cricketthomas]

can you make the tag UI components a bit more compact? also, make sure to display the existing tags in the tag editor..
also, when i try to add a new tag, it does not save..
@copilot

[cricketthomas]

can you make the tag UI components a bit more compact? also, make sure to display the existing tags in the tag editor..
also, when i try to add a new tag, it does not save..