lua-language-server not detecting types when destructuring Tuple types with ~table.unpack~

還沒有人認領這個 Issue。

### How are you using the lua-language-server?

Other

### Which OS are you using?

Windows

### What is the issue affecting?

Diagnostics/Syntax Checking

### Expected Behaviour

I might be wrong here, but I assume this should work?
Language server should detect the types from the defined tuple:

```lua
---@alias my_tuple { [1]: integer, [2]: boolean }

---@type my_tuple
local tuple = {1, true}

--- This works!
local a, b = tuple[1], tuple[2]

--- This gets "integer" for "c", but "unknown" for "d:
local c, d = table.unpack(tuple)
```

### Actual Behaviour

```lua
---@alias my_tuple { [1]: integer, [2]: boolean }

---@type my_tuple
local tuple = {1, true}

--- "c" should be "integer" and "d" "boolean":
local c, d = table.unpack(tuple)
```

### Reproduction steps

1. Define tuple like I did
2. Create such tuple
3. `unpack` to two variables

### Additional Notes

I'm not sure if this is a feature that is even considered, but since I do use unpack sometimes to destructure tuples into their distinct variables, I feel this would be a good feature to have.

### Log File

_No response_

先使用報告中的 tuple 和 table.unpack 範例重現問題，然後追蹤 language server 對 multiple assignment 和 unpacked tables 的型別推論。沒有指定原始碼檔案或測試；完成標準是該範例將 c 推論為 integer、將 d 推論為 boolean，同時不造成現有 tuple 診斷回歸。

由索引模型根據 Issue 內容生成。