Enhancement Ability to inherit/merge settings

還沒有人認領這個 Issue。

Vscode / Extension 3.5

Initially I tried to use .luarc.json file per workspace but everything is too similiar and one change means changing them for all

Current Layout

Root/Folder/WorkspaceA
Root/Folder/WorkspaceB
...

In the code-workspace file I set the global stuff
runtime.plugin
workspace.library (all workspaces base off the same libraries)

This works fine until I have to add libraries on an individual workspace. I have to copy the workspace.library settings to the workspace settings.json and then add my extra libraries. So if I change anything in code-workspace libraries I then have to go and remember to change it in any settings.json that may have changed.

```json
{
// The following settings would merge with the next higher scope instead of overwriting
"Lua.workspace.mergeIgnore": ["pathToAdditionalIgnore"]
"Lua.workspace.mergeLibrary": ["pathToAdditionalLibrary"]
}
```

未指定檔案、測試或進入點。先找出 workspace 設定如何被繼承與合併，然後定義 Lua.workspace.mergeIgnore 與 Lua.workspace.mergeLibrary 在 code-workspace 設定與 workspace 設定中的行為；當較高層級的值仍然有效，同時加入 workspace 特定路徑時，即表示完成。

由索引模型根據 Issue 內容生成。