Consider caching Alias & Command information

On every textDocument/references request and every textDocument/codeLens request, we rely on the pipeline to get the current available.

This is time consuming and bottlenecked by the pipeline thread. As such, we should consider caching this result based on the state of the Integrated Console.

Coming off the the back of #980, one of the patterns I liked was the ability to tell if something was run in the PSIC using PSRL’s ENTER handler and F8’s handler.

Bringing this concept in, we can use it as a “Dirty” check where we cache aliases and command info results, and only refresh the cache when the PSIC is Dirty.

That way, for example, our textDocument/references request and textDocument/codeLens request only rely on the pipeline once the cache is Dirty and an otherwise run unblocked giving us a perf improvement.

從 src/PowerShellEditorServices/Language/LanguageService.cs 第327行附近的關聯查找開始，然後檢視 #980 中描述的 Integrated Console 行為，包括 PSRL 的 ENTER 處理常式和 F8 的處理常式。定義當 PSIC 處於 dirty 狀態時，別名和命令資訊如何被快取及失效；完成標準是，只有在快取需要重新整理時，參照和 codeLens 請求才使用 pipeline。