Feature Request: Display changelog after extension updates

[Nischal2017]

Feature Request

Description

Users are requesting a method to learn about changes after every extension update. Currently, when the device-manager or other extensions are updated, users don't have an easy way to see what's new or what has changed.

Proposed Solution

Integrate changelog display functionality into the device-manager extension that automatically shows the changelog after an extension update is installed.

Implementation Ideas

• Display changelog in a VS Code notification or webview panel after update
• Use the existing CHANGELOG.md files from each extension
• Could be triggered by version comparison (stored last-seen version vs current version)
• Provide a "What's New" command to manually view changelog at any time

Benefits

• Improved user awareness of new features and fixes
• Better user experience and engagement
• Helps users understand breaking changes or new functionality

Extensions Affected

• device-manager (primary integration point)
• session-manager
• pamir-welcome

Additional Context

The extensions already maintain CHANGELOG.md files, so the content is available. The feature would primarily need:

1. Version tracking mechanism
2. Changelog parsing/display logic
3. UI component to present the information