VS Code extension: add resource context-menu action to attach terminal

[mitchdenny]

Feature request

Add a VS Code extension action to attach to a resource terminal directly from the resource context menu (right-click).

Proposed behavior

When a user right-clicks a resource in the Aspire extension UI, provide an action that invokes:

aspire terminal attach <resource>

(or the equivalent extension command wiring).

Why this helps

• Makes terminal attach discoverable and fast for interactive workflows.
• Avoids requiring users to switch to a separate CLI flow for common debugging/inspection.
• Aligns extension UX with dashboard/terminal-focused scenarios.

Notes

This appears related but not equivalent to terminal execution UX work (for example, "execute resource commands without opening the terminal").

Backlog

Track as backlog feature work.