Feature Request Hover Alias Original and Expanded

還沒有人認領這個 Issue。

Currently there is an option Lua > Hover > Expand Alias that allows defining an alias and instead of seeing the alias-name when using the alias you will see what the alias is made of so `---@alias myType boolean | number` will appear as `boolean | number` instead of `myType`. However, there are circumstances where knowing what the alias is but also what it is made of can be useful. Is there a way we can have a both option here where on hover we can see both the alias name and its expansion? Something like `myType - (boolean | number)`

從 Lua > Hover > Expand Alias 設定開始，追蹤型別別名的懸停呈現流程。新增一種同時顯示別名名稱及其展開結果的模式，例如 `myType - (boolean | number)`，並驗證現有的別名顯示模式維持不變。

由索引模型根據 Issue 內容生成。