[Feature Request] Command search should prioritize exact prefix matches over partial matches

Bug Description
command search should prioritize exact matches before partial or inner content matches. It just silly that typing "/us" should match "/extra-usage" before "/usage"

Environment Info

• Platform: win32
• Terminal: vscode
• Version: 2.0.42
• Feedback ID: 0fab310a-2f8a-408c-8cd8-6a1b6b052cc6

Errors

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<img width="236" height="159" alt="Image" src="https://github.com/user-attachments/assets/e94115bc-0bce-4f12-a454-5a62dcecac07" />

<img width="192" height="138" alt="Image" src="https://github.com/user-attachments/assets/4962410c-6fe2-4db2-a61a-38443d6137da" />