Enhancement Ability to inherit/merge settings

まだ誰も着手していません。

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"]
}
```

ファイル、テスト、エントリーポイントは指定されていません。まず、workspace 設定がどのように継承・マージされるかを特定し、次に code-workspace 設定と workspace 設定における Lua.workspace.mergeIgnore と Lua.workspace.mergeLibrary の動作を定義してください。上位スコープの値が有効なまま、workspace 固有のパスが追加されれば完了です。

索引モデルが issue の本文から書いたものです。