Ability to use specific enum keys as params

還沒有人認領這個 Issue。

It would be nice to be able to use specific enum keys as params. For example today if you try to do something like this:

```
---@enum TestEnum
TestEnum = {
ONE = 1,
TWO = 2,
THREE = 3,
}

---@param test TestEnum.ONE
local function test(test)
end

test(TestEnum.ONE)
test(1)
```

You will get an error:
```
Cannot assign `integer` to parameter `TestEnum.ONE`.
- `integer` cannot match `TestEnum.ONE`
- Type `integer` cannot match `TestEnum.ONE`
- Type `number` cannot match `TestEnum.ONE`
```

Interestingly lls understands that TestEnum.ONE is a real thing just not that it is equal to TestEnum.ONE or 1. For exmaple if you try this:
```
---@enum TestEnum
TestEnum = {
ONE = 1,
TWO = 2,
THREE = 3,
}

---@param test TestEnum.One
local function test(test)
end

test(TestEnum.ONE)
test(1)
```
You will get an error:
```
---@param test TestEnum.NonEnumValue
```

由於 issue 中沒有指定檔案、測試或進入點，因此請先在 lua-language-server 中尋找 enum 型別檢查與參數可指派性的處理。完成的標準是：TestEnum.ONE 可用於 TestEnum.ONE，且其底層值 1 得到一致處理，同時無效的 enum 鍵仍被拒絕。

由索引模型根據 Issue 內容生成。