Prioritize PowerShell autocomplete to top of suggestions list

Prerequisites

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Summary

Powershell has a completion API for commands that prioritizes things such as camelcase letters. For instance the first completion for g-arg is Get-AzureResourceGroup.

If possible, we should use this API and prioritize those results to the top of the list, rather than the default lexical search vscode does. This will more closely match the editor experience to the shell experience.

TBD whether this should be the default behavior or an opt-in, but either way it should be controllable via a setting.

Proposed Design

No response

まず PowerShell completion API と、VS Code 拡張機能が現在どのように autocomplete の結果を提供しているかを調査します。これらの結果をどのように優先順位付けできるか、また設定によって動作をどのように制御すべきかを明らかにします。shell スタイルの順序付けが機能し、デフォルトと opt-in の動作が定義されていれば完了です。