Add support for linking in the extension registry

[kevinjwang1]

Summary

The in-cli extension registry will now support linking if the source URI is from a filepath. The UI has been updated to give the user the choice between "Enter" for installing and "L" for linking.

Details

Added tests for linking logic.

Related Issues

Fixes #23152

[gemini-code-assist]

Summary of Changes

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This pull request enhances the CLI's extension management capabilities by introducing support for linking extensions directly from local file paths. This feature is particularly useful for developers who want to test or use local versions of extensions without needing to publish them. The changes involve updates to the command handling, UI components, and underlying logic to facilitate this new linking mechanism, ensuring a smooth user experience and proper consent management.

Highlights

• Extension Linking Support: Implemented the ability to 'link' extensions from local filepaths within the in-cli extension registry, providing an alternative to traditional installation for development or local use cases.
• User Interface Update: Modified the extension details view to present users with a choice between 'Enter' for installing and 'L' for linking, specifically when an extension is linkable (i.e., its source is a local filepath).
• Consent Override Propagation: Updated the linkAction and related UI components to correctly handle and propagate requestConsentOverride for linking operations, ensuring consistent consent handling with installation.
• New Linking Tests: Added comprehensive unit tests for the ExtensionDetails component to verify the new linking logic, including keypress handling for 'l' and conditional rendering of the 'Link' button based on the extension's URL type.

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[gemini-code-assist]

Code Review

The pull request successfully adds support for linking local extensions within the CLI's extension registry. The changes are well-implemented, including updates to the UI components (ExtensionDetails, ExtensionRegistryView), the command action (linkAction), and corresponding test cases. The logic for determining linkable extensions and handling user consent is correctly integrated. Overall, the changes are clean and effectively deliver the new functionality.