non-`file:` URIs in library/userThirdParty settings don't work

my extension generates a LuaLS userThirdParty bundle dynamically from Factorio's doc files (from the local game install, generally). I'm working on trying to switch to using a virtual FS provider for these files instead of cluttering up real workspace-associated folders with them. I've registered as the provider for fmtk: uris, and i can open all the files for the generated bundle in vscode in editor tabs, but LuaLS won't load them as libraries.

I set

"Lua.workspace.userThirdParty": [
        "fmtk:/luals"
    ],

in my settings.json, instead of setting the generated folder path as i had done previously, but LuaLS seems to have completely ignored it.

I also tried

    "Lua.workspace.library": [
        "fmtk:/luals/factorio/library"
    ],

but that also seems to ignore anything that isn't a plain file path.

首先，使用報告中顯示的 fmtk: 虛擬檔案系統提供者以及 Lua.workspace.userThirdParty 和 Lua.workspace.library 設定重現問題。追蹤這些設定如何解析函式庫路徑；當非檔案 URI 被載入為函式庫而不是遭到忽略，且有一個涵蓋此行為的回歸測試時，即表示完成。