Integrate GitHub Copilot app modernization with "Migrate to Azure" entry points and Java Upgrade detection

[fangjian0423]

Summary

This PR integrates GitHub Copilot app modernization capabilities into Azure Toolkit for IntelliJ through "Migrate to Azure" entry points and Java Upgrade detection features.

Part 1: Migrate to Azure Entry Points

Three Entry Points

1. Service Explorer - New "Migrate to Azure" node under Azure root node
2. Context Menu - "Migrate to Azure" action in project/module right-click menu
3. Project Explorer Facet - "Migrate to Azure" node under Azure facet

Plugin Installation Flow

• Detects if GitHub Copilot app modernization plugin is installed
• Shows confirmation dialog and triggers installation via IntelliJ PluginsAdvertiser
• IntelliJ automatically restarts after installation

Extension Point Mechanism

• Introduces IMigrateOptionProvider extension point for appmod plugin to provide migration options
• Uses optional dependency (config-file loading) for compatibility when appmod plugin is not installed
• Supports lazy loading for Service Explorer and Project Explorer nodes

Three States Handling

All entry points handle:

1. Not Installed - Prompts to install the plugin
2. Installed, No Options - Opens GitHub Copilot app modernization panel
3. Installed, Has Options - Shows available migration options from extension points

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Part 2: Java Upgrade Features

Startup Detection

• JavaUpgradeCheckStartupActivity - Checks Java version and framework dependencies on project open
• Detects outdated Java runtime (non-LTS versions)
• Caches issues in JavaUpgradeIssuesCache for quick access

Code Inspection

• JavaUpgradeIssuesInspection - Displays upgrade issues in editor
• Shows warnings for outdated Java versions and dependencies
• Quick fix actions to trigger upgrade via Copilot

CVE Detection

• Scans for known vulnerabilities in dependencies
• CveFixIntentionAction - Quick fix in editor
• CveFixInProblemsViewAction - Fix action in Problems view

Context Menu Integration

• JavaUpgradeContextMenuAction - Right-click action for upgrade
• Options: Upgrade Java, Upgrade Framework, Scan CVEs

Notifications

• JavaVersionNotificationService - Shows balloon notifications for upgrade opportunities
• Configurable via Settings page
• "Don't Show Again" option per project

Settings Page

• JavaUpgradeConfigurable - Settings under Azure Toolkit
• Enable/disable notifications globally or per project